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 0xdcb7d68b2f204c281fdd42b76e1fc8d93d8cf1b4fb69d0a143eb3b493e297175. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eea49024-d5ce-4987-b6bb-7fec5da229e2.json and https://artists.proofprofile.net/proofs/artist/eea49024-d5ce-4987-b6bb-7fec5da229e2.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 0x5b0331b7931d769c7698e1f3004936b055e3be0bfa1c3e525474753ed509fc68. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAJE2582115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999568d46b51b7f51cbf4b80ae5e98a73263795e50de2261426db859c7b0ed3e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAJE2582119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b02a15a39db66383416f11936df96558489b1ec84f2f63fe1104aa45f92751. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAJE2582121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4663a2bc4a6d0dcd125e04637a4693741736261168480126b77310763e27ca. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJE2582123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5451d7019bc84dc72c2df9dc8392ccae2527801c21d8d71419bff3a97c6c06. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:13Z), 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/TCAJE2582125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ab338750953dfb16b8967ec9c8c127374a758b1aec4767f4e724a0786c3de8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJE2582130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebeb427ab001cecb6e0993905be88d8eb7f39c7cf67d3d5eabf3942d919cdb5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:35:25Z), 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/TCAJE2582133.