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 0x8ebf7b5e85540ad1a097f30173ff13b9058e43f3e9ef66fb9439205357324d4e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd9b8619-2fbb-4342-b4c0-29bfa4a51c3f.json and https://artists.proofprofile.net/proofs/artist/dd9b8619-2fbb-4342-b4c0-29bfa4a51c3f.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 0x7ae7fc393a6c8cc07afcf10031434ea1eb34a28b1c6308719d5fdf8fdd683eda. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:39:03Z), 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/AEA141308233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2fff15ee27048da156fd1465100c82b09c96707afa6675ca9569ca622ce64b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:43Z), 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/AEA141602170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88227e18fea058d1dd2f2f73dd604c891e8d94f681be61deb7cfba37221705c7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AEA141602167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b6ae9eb61aa7eab3e0d5235d126823eaa709edc52c492d1fa46d237abffb98. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:39Z), 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/AEA141602166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1de775ca444384d95c3441c80a13160a42ea5ad15c44fb24029fb93673affe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:09Z), 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/AEA141608916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70f5e019a5a5f191be4be444df60ac58c39a624f6956723a9ecf9c7fcb5dd88. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:35:37Z), 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/AEA141906726.