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 0x8c2306eaaa71986464ad534e42ee432fab8aa0630855879a9c9e7fd467649b52. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5bd78e1-fbc7-4b35-913c-e0e552eaf8f8.json and https://artists.proofprofile.net/proofs/artist/b5bd78e1-fbc7-4b35-913c-e0e552eaf8f8.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 0x979a030907b3d31f27435e6a3e2dc199ac6af05eefb62a850fe32c7650200695. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:01:38Z), 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/ITG140520162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87a507e4cf814b7d9d055e6867122da052109628e0a74ec595797d19fbd066. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:43:54Z), 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/ITG140520166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924ca8a3a5b6d3b60edf9fbb9eaaa3306ff286713aec71592ce5f97ace346e9c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ITG140520371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ee861870b74a06acbcb414f0e7adae975e390aea0aab4aa6145470bd2ce985. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ITG141320016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cea02302eb36fb968d7e1ad8a03235edb29e47823756430c8f8763fac7013a6. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:02Z), 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/ITG141320018.