Verify a sealed evidence bundle
Check that an evidence bundle you downloaded is unaltered since Generative Metrics sealed it.
The check runs entirely in your browser
The bundle is checked in your browser; it is never uploaded.
The digest is SHA-256 over the bundle's canonical JSON form: object keys recursively sorted lexicographically, no whitespace, UTF-8 — computed over the full bundle with the bundleSha256 field itself removed.
Paste or upload the downloaded bundle
Paste the full contents of the downloaded gm-evidence-<id>.json file, or pick the file below.
What this check does and does not prove
- A matching digest proves the bundle is unaltered since it was sealed.
- Artifact hashes for page bodies are hash-only retention: Generative Metrics never stores or delivers those bytes, so they cannot be re-verified by re-fetching the page.
- Small stable artifacts (robots.txt, sitemap.xml, llms.txt) are kept in full and can be re-verified by re-fetching the live URL and hashing it against the bundle's artifact hash.