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 0x249322ac8081b4d295a8ba55f96ac36c3f0b38803a47c826b070218e2710d392. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb26f0bf-804d-4dcb-992e-9a82e1754358.json and https://artists.proofprofile.net/proofs/artist/fb26f0bf-804d-4dcb-992e-9a82e1754358.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'homme de chevet (Bande Originale du FilmCINE NOMINE – THELMA FILMS – ARTE FRANCE CINEMA)
L'homme de chevet (Bande originale du film de Alain Monne)
Love Hotel (Original Motion Picture Soundtrack)
Calamity, une enfance de Martha Jane Cannary (Bande originale du film)
Les Cinq Diables (Bande originale du film)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826042bd196dccf3b8c34018bf43a39337654e54e5b86d83908a194479b22264. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRIDO2212518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a763069ac0904243d3be7067d6ba954d6439080ae2d12a6bb11ca916e556d8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRIDO2212520.
Madame de Sévigné (Bande originale du film)
Le Système Victoria (Bande originale du film)