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 0x6ed343a26c5a86c90f97a8ddebf0794df3b7373fea19cff2441dadea7f9c38fe. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc3f9f06-882c-4065-a179-90b65ddcbd41.json and https://artists.proofprofile.net/proofs/artist/bc3f9f06-882c-4065-a179-90b65ddcbd41.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 0x24f1b27de16a1b2f9323a99e7506b8cbe6fb5018aedcf5d609c57a3df9725e78. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLC062408207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6f004bad7106170a1a812c3df9f9b61ee9f33cebb72c2ecee9f9e29d6fa079. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:05:03Z), 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/PLC062413489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64f323fc99197fc2ef30ae3f79e7c60e034d9c5faeff87696d5c0bb06aa324f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLC062415309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc72fcac3dd43937c1aefbea54cd8e423b2db36ca1188d6c0c64ce8237daa88a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:40:17Z), 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/PLC062424683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce64a0017598486e5adcd71b898c14be68e1abc7ad13a0453b874797caae946. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PLC062503589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d3764ee32212efbbdcfcae24148b5272a0e95650ebc23f433187f15317abd. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/PLC062507445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c461bbd647864d2f167a67239a711099a59e6c81e2f0c03db8544b6fa84c6f0. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/PLC062522931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef096bc363dcf2c471042246efa9eabd189257ddfacf6aa30076a174670779c. 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/PLB382500404.