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 0x5db75c8af3080acc176210e2b5127d38fc2b950d096fc76c8846375c172366da. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eee11217-9a33-452d-8bc0-900751f4e4a7.json and https://artists.proofprofile.net/proofs/artist/eee11217-9a33-452d-8bc0-900751f4e4a7.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 0x6e28d8e483b3f205b5688a2415c385b6d51fe7a48987dfe67862526db8b6eb6a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNMW2395375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e4b22932b07cc0543efd64ba5edbf36a487452cf81fce8d021eb8807f06447. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:55Z), 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/QZL382402101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ac8bf3629ed92fe3b0b8038efa159166b57906a8b4802b6017c4977f01764. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZL382402102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca3a942ef67027d942d1aab56d15e2487da75f9564b771266403f7b248bf967. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZL382402103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e70014a9e67cb30c3f7b7e8478a81225b9e43d60ad22141cfc4ba4f0c9dad35. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZL382402104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6800c7439470c3c216122456de785394adf9c4d5cd7cdb89147241e96ae1ba. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:52Z), 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/QZNB82421161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac873c5233091396b90ec239dc6ebfa713c6402d15e2fcf3c58288994103142f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:16Z), 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/QZNMV2479032.