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 0x5a4c5f7ffdb3a581025483fffc602ff28c654ade9c720c45bd47d592aa72c451. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53ba8c7d-de4a-4d15-93c9-f91ff83d4bb3.json and https://artists.proofprofile.net/proofs/artist/53ba8c7d-de4a-4d15-93c9-f91ff83d4bb3.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 0x00df2905ee385df10df782d2aa51d1d41baef62621627e27ccef74993e90c370. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:41Z), 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/USPUP0811959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d8639102a049eb2445a4b28836fa73014e2d9f8074bef7890b74cc338aa046. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USPUP0811962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ceb9fad289246a7ab5b043271c94dc0f0ccebcd1a4619837879f9e1dd87192. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USPUP0812418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d638a2b2e50a201d9d766cd7a180841016e22e98942df087137fc9585ee84a4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USPUP0812420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370269fbea99c6cf4bb35521facf5982c185763e33f95c39b4a99694a0fac778. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USJ3V0895174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4c9f8014e86fc596e0aa3571d4f503d5d7b2e775c119a36dc3c2600597d8cf. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:24:31Z), 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/USJ3V0895175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef3adb9664fdcb26d0acbdc2f6add19993ce45f64b548d7a085c96a5ea4f61. 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/USJ3V0895178.