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 0x80500eea05337c88f9b5fae5d58ae21d151fe14d7eec11a0fde06c4aee8fa92c. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa832688-f373-4a3b-8751-56c651b33382.json and https://artists.proofprofile.net/proofs/artist/fa832688-f373-4a3b-8751-56c651b33382.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Claude Bolling's Live at the Meridien - Paris
The Victory Concert, Echoes of 1944-1945 (Recorded in 1994)
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 0x54da76258c838618ae3e8c8c5ef80d821bc974a3752f674cdc308a77a7b425cf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:15Z), 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/FRX199411014.
A Drum Is a Woman, conte musical de Duke Ellington (Live au Théâtre National de Chaillot en 1996)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b16ffcba5b556f952ca07a23afa594872c5efa2a6b9475b05b56276ef88b99. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX190734089.