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 0x3b5c4d514921e8c9e5d48acc5428dacd2b52a0f605ade0689b779171fa4d3704. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/254ba7ea-776d-46b8-9d2a-f5fbcb5b9dda.json and https://artists.proofprofile.net/proofs/artist/254ba7ea-776d-46b8-9d2a-f5fbcb5b9dda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x27a98e3c818b49d255c6abbee88c82d7cf17dfdc0aee02ecf474f561914a51e8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:52Z), 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/QZFZ31904407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cb28260c5b23de38e9d0fdc00b29b981f17fddc34ec5049454728abb727d47. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZFZ31904409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8047f3ec42443d050a9215cc159d1910b17d54c8bf5790a77844a9f6ab3bbb1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ31904417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1ff2cadfd94e2630453f23de948dc5aa936f37f86ed32c107e2cbe8f368a6b. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USCGH0666298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b58cf2a20473a0c77a286bddf1e35563306bc291a8c8ebd7cda88b7ebec351. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:24:08Z), 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/USCGH0666301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322d00dc694f9e65757a34e9d2eb52c684cd9264edc40ce965bcd72c62d7f5e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0666305.