{
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 "constitutionVersion": "1.0.0",
 "createdAt": "2026-08-12T00:00:00Z",
 "description": "Append-only Evidence Passport records. Old revisions are immutable; corrections create a new revision and preserve the previous permalink.",
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  "type": "project",
  "id": "singapore-tracetogether",
  "title": "TraceTogether & SafeEntry Digital Contact Tracing",
  "canonicalUrl": "https://1001smartcities.org/projects/singapore-tracetogether/"
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 "currentRevisionId": "2026-08-27-source-dating",
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     "operation": "add",
     "path": "/evidencePassport",
     "summary": "Added claim-level evidence mapping and source dossiers."
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    {
     "operation": "add",
     "path": "/revisionHistory",
     "summary": "Established a permanent, hash-addressed baseline revision."
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     "status": "unreviewed",
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     "status": "completed",
     "outcome": "succeeded",
     "evidenceGrade": "official",
     "timeline": {
      "started": 2020,
      "ended": 2023
     }
    },
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     "operator": "GovTech Singapore",
     "actorTypes": [
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     "fundingModel": "public",
     "fundingDescription": "Singapore government (Ministry of Health / GovTech / Smart Nation and Digital Government Office)",
     "cost": "SGD 180 million (total programme lifetime cost, mostly TraceTogether Tokens; per Ministry of Health)",
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     "decisionRights": null,
     "exitConditions": null
    },
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     {
      "id": "clm-5672230b713d8c60",
      "field": "snippet",
      "text": "used Bluetooth proximity (the open-sourced BlueTrace protocol) and QR-code logging for COVID-19 contact tracing from March 2020",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The agency's own account describes the BlueTrace protocol Singapore built and open-sourced and why it stayed with it; the discontinuation notice describes TraceTogether and SafeEntry together as the country's digital contact tracing systems.",
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      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
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      "field": "snippet",
      "text": "Adoption reached 70% (3.8 million users) by December 2020",
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      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The ministry's release is headed 'TraceTogether Adoption Surpasses 70% - CCs to Re-open For Token Collection Progressively' and dates the milestone to December 2020 in its own text.",
      "caveat": null,
      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-99c236180ee4a504",
      "field": "snippet",
      "text": "Contact tracing ended in February 2023, the systems were declared no longer required after 5 January 2024, and the data was deleted on 1 February 2024",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The discontinuation notice: the ministers 'determined that these digital contact tracing systems would no longer be required after 5 January 2024', and 'As of 1 February 2024, all COVID-19 related personal contact tracing data derived from TT and SE has been deleted'. The parliamentary question frames the contact tracing period as 'between March 2020 and 13 February 2023'.",
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      "interpretation": {
       "added": false,
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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      "field": "snippet",
      "text": "after a 2021 controversy over police access",
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      "supportNote": "The January 2021 report set out that police could access TraceTogether data despite earlier assurances; the discontinuation notice records the response, Part 11 of the COVID-19 (Temporary Measures) Act, enacted in February 2021 to limit use to contact tracing 'or for criminal investigations and proceedings in respect of serious offences'.",
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       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-1b324cbb12c19f52",
      "field": "impact",
      "text": "The health ministry estimates about 600,000 quarantine orders were issued with TraceTogether supplementing conventional contact tracing",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
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      "supportNote": "Verbatim: 'We estimate that about 600,000 quarantine orders were issued, with TraceTogether supplementing conventional contact tracing methods.'",
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      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-893fed8051901c49",
      "field": "impact",
      "text": "puts the total programme cost, app and tokens together, at about $180 million, the majority of it the tokens",
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      "supportNote": "Verbatim: 'The total cost of the TraceTogether Programme, including development of the TraceTogether App for handphones and the provision of TraceTogether Tokens, was about $180 million. Majority of the cost was incurred for the TraceTogether Tokens'.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
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      "field": "impact",
      "text": "Adoption had passed 70%, some 3.8 million users, by December 2020",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The ministry's own milestone release on adoption surpassing 70%.",
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      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-0501ae2f40665677",
      "field": "lesson",
      "text": "The data was deleted on 1 February 2024, all of it but the records of one 2020 murder case, which the police keep",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "Verbatim: 'All COVID-19 related personal contact tracing data derived from TraceTogether and SafeEntry deleted as of 1 February 2024, with the exception of the TraceTogether data pertaining to a murder case in May 2020', which 'will be retained by the Singapore Police'.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-859eaea102f05279",
      "field": "lesson",
      "text": "the health ministry replied that it no longer has the detailed data because the records were deleted when the programme stood down, and could only estimate",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
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      "supportNote": "The question asked how many cases identified by contact tracing 'would not have been identified through conventional contact tracing methods'. The answer opens: 'We no longer have detailed data on the TraceTogether Programme as records have all been deleted when we stood down the programme.'",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-d02626b24cc41901",
      "field": "lesson",
      "text": "Deleting the data kept the promise and destroyed the evidence",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The two sit together in the record: the discontinuation notice is the promise kept, and the parliamentary answer is what it cost - a question about the programme's contribution that the ministry cannot answer from data it no longer holds.",
      "caveat": "The entry's own reading of the two documents side by side; neither source draws this conclusion.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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      "id": "src-b01206a8312ffe38",
      "title": "MDDI: Discontinuation of TraceTogether and SafeEntry",
      "url": "https://www.mddi.gov.sg/newsroom/20240105/",
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       "publishedAt": "2024-02-05",
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     {
      "id": "src-6ed2968d70db53b3",
      "title": "MDDI: TraceTogether Adoption Surpasses 70%",
      "url": "https://www.mddi.gov.sg/newsroom/tracetogether-adoption-surpasses-70/",
      "publisher": {
       "name": null,
       "domain": "mddi.gov.sg",
       "classification": "not-classified"
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      "role": "claim-evidence",
      "claimRefs": [
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       "status": "record-date-only"
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       "type": "descriptive-source-note",
       "value": "The adoption milestone announcement. No publication date is shown on the page.",
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       "archiveUrl": null,
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       "contentHash": null,
       "status": "not-captured"
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      "id": "src-995ec859d9863fa4",
      "title": "MOH: Assessing TraceTogether's Contribution and Total Programme Cost",
      "url": "https://www.moh.gov.sg/newsroom/assessing-tracetogether-s-contribution-to-covid-19-contact-tracing--total-programme-cost-and-lessons-for-future-digital-tracing-/",
      "publisher": {
       "name": null,
       "domain": "moh.gov.sg",
       "classification": "not-classified"
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      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
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       "updatedAt": null,
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       "recordLastVerifiedAt": "2026-08-26",
       "dossierCreatedAt": "2026-08-26",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The health ministry's answer to a parliamentary question on what TraceTogether achieved and what it cost. No publication date is shown on the page.",
       "exact": false
      },
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       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
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     },
     {
      "id": "src-0421a3bc8b412021",
      "title": "GovTech: Two reasons why Singapore is sticking with TraceTogether's protocol",
      "url": "https://www.tech.gov.sg/technews/two-reasons-why-singapore-sticking-with-tracetogether-protocol/",
      "publisher": {
       "name": null,
       "domain": "tech.gov.sg",
       "classification": "not-classified"
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      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
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      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
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       "recordLastVerifiedAt": "2026-08-26",
       "dossierCreatedAt": "2026-08-26",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The agency's account of why Singapore kept its own BlueTrace protocol. No publication date is shown on the page.",
       "exact": false
      },
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       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-d48e36dbc4790f11",
      "title": "MIT Technology Review: Broken promises — how Singapore lost trust on contact-tracing privacy",
      "url": "https://www.technologyreview.com/2021/01/11/1016004/singapore-tracetogether-contact-tracing-police/",
      "publisher": {
       "name": null,
       "domain": "technologyreview.com",
       "classification": "not-classified"
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      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
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      "temporal": {
       "publishedAt": "2021-01-11",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-26",
       "dossierCreatedAt": "2026-08-26",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Independent press: 2021 police-access controversy and legislative fix",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 10,
     "claimsMapped": 10,
     "sourcesTotal": 5,
     "sourcesUsedByClaims": 5,
     "sourcesWithPublicationDate": 2,
     "sourcesWithArchive": 0,
     "sourcesWithExactLocator": 0,
     "sourcesWithContentHash": 0
    },
    "limits": [
     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
    ]
   }
  },
  {
   "id": "2026-08-27-source-dating",
   "createdAt": "2026-08-27T13:37:00Z",
   "effectiveAt": "2026-08-26",
   "changeType": "correction",
   "summary": "Every source on this entry now carries a date key: a publication date where the publisher states one, otherwise an explicit null with the reason on the record.",
   "preparedBy": {
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    "humanApproved": false
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   "review": {
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    "date": null,
    "note": "Awaiting operator and domain-expert review; publication of this revision implies neither."
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   "changes": [
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     "operation": "replace",
     "path": "/snapshot/projectFingerprint",
     "summary": "Updated projectFingerprint to the current sourced project record."
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    {
     "operation": "replace",
     "path": "/snapshot/sources",
     "summary": "Updated sources to the current sourced project record."
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    "projectFingerprint": "sha256:25ec3614d56f21abec6b911493eebe0415acf0e483ffc45c5447b2b47dd127a4",
    "assurance": {
     "status": "unreviewed",
     "scope": "evidence-passport-revision",
     "statement": "AI-assisted structural preparation. This revision has not been reviewed by a human or subject-matter expert.",
     "machineChecks": [
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    "projectState": {
     "status": "completed",
     "outcome": "succeeded",
     "evidenceGrade": "official",
     "timeline": {
      "started": 2020,
      "ended": 2023
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    },
    "governance": {
     "operator": "GovTech Singapore",
     "actorTypes": [
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     "fundingModel": "public",
     "fundingDescription": "Singapore government (Ministry of Health / GovTech / Smart Nation and Digital Government Office)",
     "cost": "SGD 180 million (total programme lifetime cost, mostly TraceTogether Tokens; per Ministry of Health)",
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-5672230b713d8c60",
      "field": "snippet",
      "text": "used Bluetooth proximity (the open-sourced BlueTrace protocol) and QR-code logging for COVID-19 contact tracing from March 2020",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-0421a3bc8b412021",
       "src-b01206a8312ffe38"
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      "supportNote": "The agency's own account describes the BlueTrace protocol Singapore built and open-sourced and why it stayed with it; the discontinuation notice describes TraceTogether and SafeEntry together as the country's digital contact tracing systems.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-e5d100fa5dff701c",
      "field": "snippet",
      "text": "Adoption reached 70% (3.8 million users) by December 2020",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The ministry's release is headed 'TraceTogether Adoption Surpasses 70% - CCs to Re-open For Token Collection Progressively' and dates the milestone to December 2020 in its own text.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-99c236180ee4a504",
      "field": "snippet",
      "text": "Contact tracing ended in February 2023, the systems were declared no longer required after 5 January 2024, and the data was deleted on 1 February 2024",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      ],
      "supportNote": "The discontinuation notice: the ministers 'determined that these digital contact tracing systems would no longer be required after 5 January 2024', and 'As of 1 February 2024, all COVID-19 related personal contact tracing data derived from TT and SE has been deleted'. The parliamentary question frames the contact tracing period as 'between March 2020 and 13 February 2023'.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-003539d0bd141c66",
      "field": "snippet",
      "text": "after a 2021 controversy over police access",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The January 2021 report set out that police could access TraceTogether data despite earlier assurances; the discontinuation notice records the response, Part 11 of the COVID-19 (Temporary Measures) Act, enacted in February 2021 to limit use to contact tracing 'or for criminal investigations and proceedings in respect of serious offences'.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-1b324cbb12c19f52",
      "field": "impact",
      "text": "The health ministry estimates about 600,000 quarantine orders were issued with TraceTogether supplementing conventional contact tracing",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "Verbatim: 'We estimate that about 600,000 quarantine orders were issued, with TraceTogether supplementing conventional contact tracing methods.'",
      "caveat": "An estimate, and one the ministry says it can no longer check: the programme's detailed records were deleted.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     },
     {
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      "field": "impact",
      "text": "puts the total programme cost, app and tokens together, at about $180 million, the majority of it the tokens",
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      "mappingStatus": "mapped",
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      "supportNote": "Verbatim: 'The total cost of the TraceTogether Programme, including development of the TraceTogether App for handphones and the provision of TraceTogether Tokens, was about $180 million. Majority of the cost was incurred for the TraceTogether Tokens'.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     },
     {
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      "field": "impact",
      "text": "Adoption had passed 70%, some 3.8 million users, by December 2020",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The ministry's own milestone release on adoption surpassing 70%.",
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      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     },
     {
      "id": "clm-0501ae2f40665677",
      "field": "lesson",
      "text": "The data was deleted on 1 February 2024, all of it but the records of one 2020 murder case, which the police keep",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "Verbatim: 'All COVID-19 related personal contact tracing data derived from TraceTogether and SafeEntry deleted as of 1 February 2024, with the exception of the TraceTogether data pertaining to a murder case in May 2020', which 'will be retained by the Singapore Police'.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-859eaea102f05279",
      "field": "lesson",
      "text": "the health ministry replied that it no longer has the detailed data because the records were deleted when the programme stood down, and could only estimate",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-995ec859d9863fa4"
      ],
      "supportNote": "The question asked how many cases identified by contact tracing 'would not have been identified through conventional contact tracing methods'. The answer opens: 'We no longer have detailed data on the TraceTogether Programme as records have all been deleted when we stood down the programme.'",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-d02626b24cc41901",
      "field": "lesson",
      "text": "Deleting the data kept the promise and destroyed the evidence",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The two sit together in the record: the discontinuation notice is the promise kept, and the parliamentary answer is what it cost - a question about the programme's contribution that the ministry cannot answer from data it no longer holds.",
      "caveat": "The entry's own reading of the two documents side by side; neither source draws this conclusion.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
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      "url": "https://www.mddi.gov.sg/newsroom/20240105/",
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       "retrievedAt": null,
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       "type": "descriptive-source-note",
       "value": "The formal end of both systems: the date after which they were no longer required, and what was deleted and what was kept.",
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      },
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     },
     {
      "id": "src-6ed2968d70db53b3",
      "title": "MDDI: TraceTogether Adoption Surpasses 70%",
      "url": "https://www.mddi.gov.sg/newsroom/tracetogether-adoption-surpasses-70/",
      "publisher": {
       "name": null,
       "domain": "mddi.gov.sg",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
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      "temporal": {
       "publishedAt": "2020-12-23",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-26",
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       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
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       "type": "descriptive-source-note",
       "value": "The adoption milestone announcement. No publication date is shown on the page. The release is dated 23 December 2020.",
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      },
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       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
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     },
     {
      "id": "src-995ec859d9863fa4",
      "title": "MOH: Assessing TraceTogether's Contribution and Total Programme Cost",
      "url": "https://www.moh.gov.sg/newsroom/assessing-tracetogether-s-contribution-to-covid-19-contact-tracing--total-programme-cost-and-lessons-for-future-digital-tracing-/",
      "publisher": {
       "name": null,
       "domain": "moh.gov.sg",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
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       "dossierCreatedAt": "2026-08-27",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The health ministry's answer to a parliamentary question on what TraceTogether achieved and what it cost. No publication date is shown on the page. No publication date is recorded for this page.",
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      },
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       "contentHash": null,
       "status": "not-captured"
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     },
     {
      "id": "src-0421a3bc8b412021",
      "title": "GovTech: Two reasons why Singapore is sticking with TraceTogether's protocol",
      "url": "https://www.tech.gov.sg/technews/two-reasons-why-singapore-sticking-with-tracetogether-protocol/",
      "publisher": {
       "name": null,
       "domain": "tech.gov.sg",
       "classification": "not-classified"
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      "sourceType": "web-page",
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       "dossierCreatedAt": "2026-08-27",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The agency's account of why Singapore kept its own BlueTrace protocol. No publication date is shown on the page. The page states no publication date.",
       "exact": false
      },
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       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
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     },
     {
      "id": "src-d48e36dbc4790f11",
      "title": "MIT Technology Review: Broken promises — how Singapore lost trust on contact-tracing privacy",
      "url": "https://www.technologyreview.com/2021/01/11/1016004/singapore-tracetogether-contact-tracing-police/",
      "publisher": {
       "name": null,
       "domain": "technologyreview.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
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      "temporal": {
       "publishedAt": "2021-01-11",
       "updatedAt": null,
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       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Independent press: 2021 police-access controversy and legislative fix",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
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    "coverage": {
     "claimsTotal": 10,
     "claimsMapped": 10,
     "sourcesTotal": 5,
     "sourcesUsedByClaims": 5,
     "sourcesWithPublicationDate": 3,
     "sourcesWithArchive": 0,
     "sourcesWithExactLocator": 0,
     "sourcesWithContentHash": 0
    },
    "limits": [
     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
    ]
   }
  }
 ]
}