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 0x621323949e6d316e4f3165e540aae5f62fd2dbd99c9d4d33e0a65feb59486c43. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55e29a8b-4430-41d4-8bcd-d0c12a5d3885.json and https://artists.proofprofile.net/proofs/artist/55e29a8b-4430-41d4-8bcd-d0c12a5d3885.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 0x53a3cbf778b1e1694506813da1f4f43c10fc1bcb4ce505ec3d6617b9f8061846. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:13Z), 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/PLUM71900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f599f858c8ef3fb1ffa1f23f3b5564cbeae712adc5d9ca7384cfb9fbdf9c48. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLA282000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ac1c8984e7559cfc4f5014541889db0dfd306fe798c2a9a75519dc5bcfdc9. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:34:53Z), 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/PLA282000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15df836820b0e21bff15e11bbeadce0421f54eb6a1f87ef5bff0f26db146217f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/PLA282100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86236d951c3ff50f8c3e8df7a326e51863ea64973b03f3fe06c3e05f1c1e5add. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLA282200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e375702e00ca49b4e7bcfbd21158d8e0222e069d6983047e05a1fb0c1db826. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/PL9I92501020.