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 0x796ba10003b41d7f197af64fc16cb4b6d3f21fb4099b98034915c8f90f84af4d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cf48348-c84c-4823-8528-b09efd555f1a.json and https://artists.proofprofile.net/proofs/artist/5cf48348-c84c-4823-8528-b09efd555f1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Odermatt: Les couleurs de l'eau, Op. 22: I. Fleuve tranquille et puissant (Musical Moments)
Les couleurs de l'eau, Op. 22: I. Fleuve tranquille et puissant
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 0xb12f6a332b74cf91449a2546e38ed58d98ec4912bcc3bd5a42d35506f73b96d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN962001780.
Odermatt: Les couleurs de l'eau, Op. 22: III. Cascatelle (Musical Moments)
Les couleurs de l'eau, Op. 22: III. Cascatelle - Musical Moments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd0f878f00f529d55b49511f948a180283c0f31f77f424acb8d19a74b98aa53. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEN962300090.
Oboe Concerto in F Major (After K. 293): I. Allegro
Mozart: Works for Oboe and Orchestra / Piano (Extended Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc7a5fbb33eac15da023ac8ef8e5d0b65553967288b8093ccfa0fd189fd6bd0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN962003980.