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 0x22a349df6dfa61efe52332ee3f87e32a4b8a0bbd6d01e43869c76d330a8118d9. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98eb3c46-0c0f-4cf7-a09b-e17921378165.json and https://artists.proofprofile.net/proofs/artist/98eb3c46-0c0f-4cf7-a09b-e17921378165.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Come ye sons of art, 1694, ode for Queen Mary (excerpts)
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 0x7dc30ad46c2da68fdfb6a26c3f72d328c94bd4fbd4651013ceb6abe99cda580f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC9105759.
Purcell: Come Ye Sons of Art, Z. 323 "Ode for Queen Mary's Birthday": No. 9, Duet and Chorus. "See Nature Rejoicing"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec92b972c4673f6f9e1df238f385d2f202b8e4132fe50f03f3c05c2eb93601c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC9102755.
Purcell: Come Ye Sons of Art, Z. 323 "Ode for Queen Mary's Birthday": No. 4, Chorus. "Come Ye Sons of Art Away"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642a56d8f85b410dd92e0cf28615e68fa363a7702a9d3458ce16b510919d80bf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAYC9102750.