C01 · Integrity and freeze record · 6 September 2026

C01 five-market integrity and freeze record

The principal five-market crawler-access analysis is verified and frozen. This record states what was checked, what agreed, and — equally importantly — which class of reproducibility is not established.

StatusVerified and frozen
MarketsAU · US · GB · SG · IN
Freeze date6 September 2026
InstrumentPTODA C01 Crawler v1.5 / v1.5.1
18/18
byte-portability comparisons agreed, across six frozen source artefacts.
All five principal market results reproduce from frozen source files with zero discrepancies. No published numerical error has been identified in the principal C01 access findings.
1 · Reproduction

The five market results reproduce exactly

Independent recomputation from frozen source artefacts.

The 6 September 2026 frozen-state inventory independently recomputed the five markets’ principal values from their frozen source artefacts. The reproduced values matched the recorded values with zero discrepancies.

No published numerical error has been identified in the principal C01 access findings.

2 · Byte portability

Six frozen artefacts, three representations each

A file that changes bytes between representations cannot be cited reliably.

Each frozen CSV was compared in three independent representations — the working tree, the Git blob, and the output of git archive — against its recorded SHA256:

worktree SHA256 = Git blob SHA256 = git archive SHA256 = recorded frozen SHA256

Result: 18 of 18 hash comparisons agreed; zero divergence. The governed repository attribute state resolves all six frozen CSVs as text: unset (-text), preserving their literal bytes across checkout and export.

Frozen source artefacts and recorded SHA256
Market / sourceSHA256
Australia20d53386bd28cedf87bcc054b91a23b816751d3a47a65215401090d68a513fb1
United States669404a4d2aa8bc725d74c7bf2ffacd2d670aa0599a69ee74d4d018155831053
Great Britain258cb3750b11e09ac922a65e515d11d70d5c5cc2011d217c031ed01f61b5ff7d
Singaporee5554d62ad1787a0afab5d47544962c0baa08b49203c9bdb232d9154e1da98b4
India — R006-IN crawl2494906ec58f59a9260160f825d1af0c809843f1d9bea0b6a5a2bcf435e0f109
India — registry v1.07d2436a00167ccfefac5ee94214f0ac9d7680343512e8054de8a3c97d4cf5b8d
3 · The boundary

What is reproducible, and what is not

The distinction this record exists to keep explicit.

Research reproducibility remains intact. The frozen datasets, the instrument and the recomputation path all hold, and the five market results reproduce from source with zero discrepancies.

Historical publication-layout reproducibility does not. The render implementation used to produce certain historical published artefacts was not captured into repository custody at the time, so those exact published layouts cannot now be regenerated byte-for-byte from the repository alone.

PROVENANCE-DEFECT-002 is a publication-build archival defect. It is not a numerical or measurement defect.

The missing historical render implementation does not invalidate any C01 finding. No figure on any C01 page depends on it. What it affects is the ability to reconstruct a historical document’s exact typeset appearance — a publication-archival property, distinct from the reproducibility of the research itself.

4 · Forward control

The control this defect produces

Recorded so the same gap cannot recur silently.

Publication-build source is a governed research artefact. Render implementation, dependency manifest/lockfile, figure-generation source, build instructions and runtime versions must enter repository custody before publication freeze and be versioned alongside instrument, frozen dataset and manuscript.

5 · Qualifications

Governance qualifications carried with this freeze

None of these changes the principal five-market numerical findings.

6 · Interpretation boundary

What the frozen evidence may and may not be used to say

Carried forward into every C01 publication.

The five-market report may describe observed cross-market differences. It must not claim that geography causes those differences.

C01 measures crawler access only. Crawler access must not be presented as equivalent to AI visibility, AI ranking, AI citation, AI recommendation, digital authority, or downstream commercial performance. Those are separate empirical questions.

Five-market comparative findings →