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 0xd5970d278019f12b713be3e0ffeff263859398ca201826628b1f9683f9178580. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2834d075-9bd3-44d3-89e3-13414de8abdb.json and https://artists.proofprofile.net/proofs/artist/2834d075-9bd3-44d3-89e3-13414de8abdb.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Ballet Class with Ballerina Birdies~piano Music from Hawaii, Vol. V
Sleeping Beauty, Op. 66: Act III No. 25, Pas de quatre, Blue Bird (Warm up 2/4 Measure 64)
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 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 0xb1713f401ccf9629eef2a967ac96e670d9ce09cc41a2c895b28632cc798463a6. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1649733 — a six-check JSON result.
Coppelia, Act III No. 20 Danse de fete (Passe 2/4 Measure 64)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc810564c2451696c98257ebf2c568f4ca8f2662acc6e78c7c7ff7a4a0390b15. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1649734 — a six-check JSON result.
Sleeping Beauty, Op. 66: Act III No. 23, Pas De Quitter II (Jump 2/4 Measures 64)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ea7775e36ce6f4d6028c48a304e8903cdcce1ca8cea1404b03bdafa7eb628b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1649736 — a six-check JSON result.