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 0x6af63b5ca2c00f8333fc22c430ee2f2d968b883bb0bb875c3da76e083beaa2b7. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c374b4b6-6399-46f6-b1a5-b5a702bf5e16.json and https://artists.proofprofile.net/proofs/artist/c374b4b6-6399-46f6-b1a5-b5a702bf5e16.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 0x5adae43189705e2a4219ac99f6dc98f5c9d4368b7dbf61046be5634c3b20f001. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:39Z), 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/PECR22401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0246bc3d562a85287d93b517282af9151bb3b2ff78908f1e68bbcc564419f6a0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:34:06Z), 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/PECR22401133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7c0c322fcd84fb04c3ad5bf828cfb5d9d7783ddc14574a1b4e24ccb77347d6. 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/PECR22401134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc7504ecf05001c3e36c8af8f0770730a661ed3e16ae94d368bdba6cec82ac8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PECR22401136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de75a8984ceeeebbf10cea3e38664c30aba87ba200008ad80d3751996ebb8ca. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:58:43Z), 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/PECR22401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b569bda21db86d635d74c1d74e56d1070d8ed2fc9c528d74a80afab4595972. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PECR22401138.