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 0xd42e636a36014ec8caf56e821ccd60e71caa6c55571c243845a156cebc967f92. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90bf6b29-cfe7-4aaf-a30e-92c6180c44af.json and https://artists.proofprofile.net/proofs/artist/90bf6b29-cfe7-4aaf-a30e-92c6180c44af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jésus la Pièrre Angulaire (L'adoration rien que l'adoration)
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 0x54c01a11bb612cfcd80cc2cdb811fbc317dd29d0fb19650084fbf519efd7f82d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA0R2463092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefd20176fe90de566f78e1c8f5a480a2d6607e80fce9643a77fe74e6ee719a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0R2463093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60914c5995042d41d8bc8fbed9497e90f24fcc848974095017ef17cc247008. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0R2463094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1216c67a1a82de85cd9d30065200b6d753288dff39ce3a7e75d80954305ae440. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA0R2463095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9c5f9321939818b90b5c54e774d1f047e49643f800c4381e2d4c401544d125. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DGA0R2463096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7118346ab54fc7bf5922f42d31dd46c9c172c63467b442a532ff463cafff58. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:58Z), 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/DGA0R2463098.