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 0xcecd9c5701f51609563ba3f4e076efa8c791123f6883bd54e971303bf47e8b8c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e11ce56f-6638-44cc-ba3b-fe1f92f40936.json and https://artists.proofprofile.net/proofs/artist/e11ce56f-6638-44cc-ba3b-fe1f92f40936.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 0x4ca7f78a491f95cb6efc9726fe8b31460fab903cbf84132a3179cfcf12c0204a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA612303623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed7e61cbb30ee12f7e8d258bbf911f22894ffa591435f582233cf2adf562ca. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:41:25Z), 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/HUA612303629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2682af242fa69ac7191f19212820c89dd158126b8153f3a29c4a5eec77e8fcbf. 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/HUA612303630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5146e59ded84d1821fadd9d75d7d62291c83e49e6bf4f02dda94b529522f23. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:13Z), 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/HUA612400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74361ff0d93916f3d50a48c2a189d0fe62794bc88c4ba1dc924447e65f905b18. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/HUA612401925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721e05387bc93412fb292062d84f842bb0d32af43393cbd6948009e4ad29d619. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HUA612402913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87343dc3061a9f83545b8e0fc55352a89d584d0ff760cc79f18e339ea70197af. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/HUA612404800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcbf748ba6706891f1159fab55fd69de589a29ff554c06c64a2ccdc6af29528. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:51Z), 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/HUA612502264.