1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837b843791fbe2849b01978c9cf76d466ff4c9701db1edcba3cb3aa1f13771ac. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21cfd1bd-b5bd-4833-a480-de334fd34955.json and https://artists.proofprofile.net/proofs/artist/21cfd1bd-b5bd-4833-a480-de334fd34955.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Doux rêve d'un été sur l'ile de la vieille