1001 Smart Cities

Permanent project revision

Digital Circular Material Passport Ledger

Revision 2026-08-21-evidence-baseline · effective 2026-07-20

Superseded. A later revision exists: 2026-08-21-unsourced-text-correction →

unreviewed

Created the first structured Evidence Passport with 7 claims and 3 source dossiers.

sha256:47558d320f44704bb5bb6e057e06f35a1f5c906d47ce7e9795a4a72c8ffeff0f
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
7
of 7 claims mapped
3
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-55f508e9dc2f3bab descriptive
Amsterdam's Circl pavilion
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The project page is titled 'Circl, Amsterdam' and describes it as a pavilion: 'The ‘Circl’ pavilion is unique in the Netherlands: the first constructed practical example of sustainable and circular designs.' Client is named as ABN AMRO.
Caveat
The page confirms the pavilion and the city, but never gives its address or district; it does not place Circl at Zuidas.

Sources carrying this claim

  1. Dutch Architects (trade press)
Claim 2 clm-96f4f4e11db5da4c descriptive
digital material passport
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Dutch Architects records that Circl's materials 'have been recorded in a ‘digital twin’; the building passport is named LLMNT.' I amsterdam defines the instrument: 'Digital material passports are databases that record detailed information about materials, enabling future reuse, reducing waste, and supporting a circular construction economy.'
Caveat
Neither source calls the Circl passport a Madaster passport, and neither says it was Madaster's first — I amsterdam lists Madaster's Amsterdam-area projects as Schiphol Trade Park and Juf Nienke, not Circl.

Sources carrying this claim

  1. Dutch Architects (trade press)
  2. I amsterdam (city business platform)
Claim 3 clm-c82c93d6d12bd9b9 descriptive
logging every material for future reuse
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
'All materials, components and parts that make up the building have been recorded in a ‘digital twin’', and reuse is stated as the purpose from the outset: 'The reuse of the applied materials was factored into the process right from the start.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Dutch Architects (trade press)
Claim 4 clm-a8261dd7f6a990d2 descriptive
under the name ‘LLMNT’
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'the building passport is named LLMNT.'
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Dutch Architects (trade press)
Claim 5 clm-11bcaacda6f70721 quantitative
Eight Amsterdam-region municipalities got their own building passports in 2019
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Madaster's post, dated 6 Nov 2019: 'On 31 October, eight municipalities received a certificate for their advanced implementation of material passports, as part of a material passport pilot project. These municipalities in the Amsterdam metropolitan area (MRA) were each presented with a Madaster material passport for one of their buildings.' Named: Amsterdam, Almere, Diemen, Edam-Volendam, Haarlem, Lelystad, Uithoorn and Waterland.
Caveat
The same post also says the eight 'were awarded this certificate because they were well on their way to obtaining a material passport', so the passport was not necessarily complete on the day. Each passport covers one building per municipality, not a municipal portfolio, and the MRA reaches well beyond Amsterdam (Almere, Lelystad). The account is the platform operator's own.

Sources carrying this claim

  1. Madaster (technology partner)
Claim 6 clm-89d90f0f860af627 descriptive
ongoing circular-building pilots in Buiksloterham, Strandeiland and Overhoeks
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The page, updated 6 November 2025, lists under contractor Dura Vermeer: 'Circular neighbourhood pilots in the Amsterdam Area, such as Strandeiland IJburg and Overhoeks, Buiksloterham, Amsterdam-Noord.' A second company (FRONT) is credited with 'Buiksloterham circular houses'.
Caveat
All three sites appear only as a company's project list on a city investment-promotion page — no start dates, size, budget or per-pilot status is given, and no source outside the page confirms the pilots are running.

Sources carrying this claim

  1. I amsterdam (city business platform)
Claim 7 clm-f055634e5b48616f descriptive
aim to keep demolition materials in local use
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The demolition half is stated for the same contractor: Dura Vermeer is 'actively embedding circular principles into its projects – from modular building designs to the reuse of demolition waste', and works with 'materials passports to track resources throughout their lifecycles'.
Caveat
The 'local' half is not stated for these pilots. It rests on a different company on the same page (Buurman Amsterdam, which sources from regional deconstruction projects and 'supports local makers'); no source says materials from Buiksloterham, Strandeiland or Overhoeks stay in the region.

Sources carrying this claim

  1. I amsterdam (city business platform)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-21-evidence-baseline effective 2026-07-20 · created 2026-08-21

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:47558d320f44704bb5bb6e057e06f35a1f5c906d47ce7e9795a4a72c8ffeff0f
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
7
of 7 claims mapped
3
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Madaster
Actor types
private
Funding model
Not recorded
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

3 source dossiers

Madaster (technology partner) madaster.com · 1 linked claim

Open original source ↗

Stable source ID
src-72fd5179c95dc0ce
Publisher
Name not classified · madaster.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official record of the 2019 material-passport certificates awarded to 8 Amsterdam-area municipalities.

Descriptive only — not page/paragraph exact
Claims linked
Dutch Architects (trade press) dutcharchitects.org · 4 linked claims

Open original source ↗

Stable source ID
src-12e70da2cb624ac5
Publisher
Name not classified · dutcharchitects.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Confirms the Circl pavilion's material passport is named 'LLMNT'.

Descriptive only — not page/paragraph exact
Claims linked
I amsterdam (city business platform) iamsterdam.com · 3 linked claims

Open original source ↗

Stable source ID
src-93a23f020eb629a0
Publisher
Name not classified · iamsterdam.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Confirms ongoing circular-neighbourhood pilots in Strandeiland, Overhoeks and Buiksloterham; updated Nov 2025.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • 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.