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 0x88b506c024c5758f2ea010c4a67ca28042bb6f82929cc147cc5a1fcb358a3a10. 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/e6446843-abcb-43b6-a244-03a33086971e.json and https://artists.proofprofile.net/proofs/artist/e6446843-abcb-43b6-a244-03a33086971e.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 0x512bce2ee57cac33fb29b682d38918d22f2d2346609a5abea4845282de5e4c84. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:37Z), 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/SE5BU1979189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534b61c143508a00f8309fd51dbaa244a6f173b8ff3eee1ab4ca5dd4aeca6f18. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE5BU1979186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e27ca3a3c4eb9c245874703e9f519e1a6cc699989de5b4a2c683b620ac4e66. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:40Z), 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/SE5BU1979188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c729cd91771731e874e4db209172cfb0e22f8b5a1e5ebdf39226859218dbd6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE6HN2186672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0722c0e9d70abaccd3a22992ae4c2da04ce9cc3de12ff2ce68973d756edde1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:04:32Z), 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/SE6I32152494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c190424849e9e80fa630c8bb2d13bf5379bb6586cbbd78d3b8076c002353e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:01Z), 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/SE6XW2223218.