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 0x66a622ab934cbedbbfd9cae23e730fd71c122a3ab0fb357e012e5d8700f884fd. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08f1d28e-311d-4b56-a906-f6683f4dd2b4.json and https://artists.proofprofile.net/proofs/artist/08f1d28e-311d-4b56-a906-f6683f4dd2b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cocktail musette, vol. 14 (Mono Version)
Spécial pour danser, no. 19 : 4 javas (Mono Version)
Émile Prud'homme joue Édith Piaf et Charles Trenet
Et ça repart ! (Collection "Les archives de l'accordéon")
Emile Prud'homme Et Sa Boite A Punaise Vol 1