Issuer profile · Ahura
Verifiable mastery, signed.
Ahura turns video lectures into grounded, assessable credentials. Each credential is signed with a rotating Ed25519 key, anchored to an append-only hash chain, and rendered as Open Badges 3.0 JSON-LD.
Issuance posture
Every credential carries at least one grounded evidence row — a timestamped quote from the source video. No evidence, no credential. The hash chain ties each issuance to the previous, so backdating is detectable by anyone.
Key rotation
Public keys are served at /.well-known/jwks.json. Retired keys stay published so historical credentials remain independently verifiable.
Hash chain
Each credential record records the SHA-256 of the previous credential's canonical core. Tampering with any earlier issuance invalidates every subsequent one — a transparent audit trail with no third-party ledger.
Revocation
Status lives on the verifier endpoint. A revoked credential's signed JSON remains downloadable for inspection — the verifier reports the revocation reason and date, and the badge page renders a calm Revoked state.
Public keys
| KID | Curve | Alg | Use |
|---|---|---|---|
| mlsnJTtk…WABA | Ed25519 | EdDSA | sig |