Verify a determination certificate
Hand over the certificate you were sent. Its signature is checked against our published public key. No account needed.
Drag the certificate hereUpload your certificate
The .html file you were emailed, or the raw .jsonThe .html file you were emailed
Checks
- SignatureMatches our published Ed25519 key—
- Still currentNo later correction replaced it—
- ContentsTotals complete, nothing left for review—
Waiting for a certificate
The verdict appears here: whether the signature is genuine, whether this is still the current answer, and exactly what the document claims.
You do not have to take our word for any of this. The signature is standard Ed25519 over the JSON-canonical form of the payload, and our public keys are published at /v1/verify/keys. A twenty-line script can do the same check offline, without contacting us at all — which is the point of issuing certificates rather than asking people to log in.