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 0xd266a147d5f52b890285dfa09c9e9b43d6c78c4f599e5dd01dbda42064014142. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca4e57f5-63aa-4f42-94b8-c22ebe012711.json and https://artists.proofprofile.net/proofs/artist/ca4e57f5-63aa-4f42-94b8-c22ebe012711.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Suite in D Minor, HWV 437: III. Sarabande
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 0x439d04fb7e3eedc6ccb88ce840243d20ef5d81905cbcfc48dc1ac9e48bba6944. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBAYC0201575.
Harpsichord Suite No. 4 in D Minor, HWV 437: III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d04fb7e3eedc6ccb88ce840243d20ef5d81905cbcfc48dc1ac9e48bba6944. 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/GBAYC0201575.
Harpsichord Suite No. 4 in D Minor, HWV 437: Sarabande
Harpsichord Suite No. 4 in D minor HWV437: Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d04fb7e3eedc6ccb88ce840243d20ef5d81905cbcfc48dc1ac9e48bba6944. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0201575.
Harpsichord Suite No. 4 in D Minor, HWV. 437: III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d04fb7e3eedc6ccb88ce840243d20ef5d81905cbcfc48dc1ac9e48bba6944. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC0201575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d04fb7e3eedc6ccb88ce840243d20ef5d81905cbcfc48dc1ac9e48bba6944. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC0201575.