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 0x4c4a4550ce81d0678b6ce7143fef6f586d3fae6b43cadaf903afb9ab80011b74. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b2f5ddc-825a-4748-9ca6-44e8a7d5c044.json and https://artists.proofprofile.net/proofs/artist/0b2f5ddc-825a-4748-9ca6-44e8a7d5c044.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
QU'EN SERA-T-IL (BO de "LA CORRIDA" de Ryan Daoudi)
PLUS JAMAIS LA MÊME [Musique du film documentaire "(SUR)VIVANTS" par Claire Lajeunie]