The receipts.

This is the live trust state of @kontourai/surface v0.12.0, the reference implementation of the Hachure spec. The panel below is rendered by the <surface-trust-panel> web component from kontourai/surface opens external site and loaded from /trust/latest.json.

The bundle was generated by running real checks against the v0.12.0 checkout: npm test (pass/fail counts captured as evidence), all five Hachure spec conformance vectors opens external site (per-vector results), statusFunctionVersion agreement between implementation and spec package, and git tag/commit anchored as the integrity reference. Producer: kontourai-surface-release.

Recompute it yourself. The report JSON is the output of buildTrustReport(bundle) — a pure, deterministic function of the bundle data and a now timestamp. Clone kontourai/surface, run node scripts/release-trust-bundle.mjs --out /tmp/my-check, and compare. Any conforming implementation of statusFunctionVersion = "1" must produce the same per-claim statuses for the same inputs.
Verify it yourself — live endpoint. This site serves the hachure.org/v1 verification-endpoint profile opens external site at /.well-known/hachure/verify. It is a second, independent implementation — it does not use @kontourai/surface — proof the spec is implementable from its text alone. The signed release assets for v0.12.0 are also available: trust-bundle.dsse.json opens external site and trust-bundle.sigstore.json opens external site. The in-toto statement inside the DSSE binds trust-bundle.json to a Fulcio certificate for publish-npm.yml@refs/tags/v0.12.0. Digest binding is inspectable today:
curl -sL https://github.com/kontourai/surface/releases/download/v0.12.0/trust-bundle.dsse.json \ | python3 -c 'import json,base64,sys; e=json.load(sys.stdin); p=json.loads(base64.b64decode(e["payload"])); print(p["subject"][0]["digest"]["sha256"])' # → 509156f3c8d3351986038c3f58497b455f3dd0694ae4193d15ed6b4ab8d58e84 # shasum -a 256 trust-bundle.json ← must match
Verify the COSIGN-signed bundle directly:
cosign verify-blob \ --bundle trust-bundle.sigstore.json \ --certificate-identity "https://github.com/kontourai/surface/.github/workflows/publish-npm.yml@refs/tags/v0.12.0" \ --certificate-oidc-issuer "https://token.actions.githubusercontent.com" \ trust-bundle.json
Live query example:
curl 'https://hachure.org/.well-known/hachure/verify?ref=git:5446610e8245f1051bb4964353266d1b65b27bad'