1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee86b3ba52bdfeb0c8b3ea4df7c7953aefc41d7230d701f07cd820b59e26b19. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a927fc2-8f70-497c-8d7b-15dd20237a69.json and https://artists.proofprofile.net/proofs/artist/7a927fc2-8f70-497c-8d7b-15dd20237a69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La folle histoire d'amour de Simon Eskenazy (Bande originale du film)
Du vent dans mes mollets (Bande originale du film)
Ôtez-moi d'un doute (Original Motion Picture Soundtrack)
La folle aventure de Louis de Funès (Original Motion Picture Soundtrack)
Thélonius et Lola (Bande originale du spectacle)