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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8708ac826da4835cb64db63e3df3745ae3057340f0a08b30249be81f14308a5. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/266dabdf-7aa7-4c3c-88e7-867f6a7a256b.json and https://artists.proofprofile.net/proofs/artist/266dabdf-7aa7-4c3c-88e7-867f6a7a256b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Demain, tous crétins ? (Bande originale du film)
Le psychiatre et l'assassin (Musique originale du film)
Microbiote, les fabuleux pouvoirs du ventre (Musique originale du film)
Secrets d'ambassades (Original Motion Picture Soundtrack)
Les Experts du Crime (Original Motion Picture Soundtrack)
Attentats 2015 - Ce Qui Nous Lie (Original Motion Picture Soundtrack)
Les fossoyeurs : au cœur du scandale des Ehpad