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 0x11049c7b287596154ab14ae48b40fd00afca1bd338de9c3bb08047186b8d769b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3ec7d21-cd1a-4f97-84ab-cf38e17ad760.json and https://artists.proofprofile.net/proofs/artist/f3ec7d21-cd1a-4f97-84ab-cf38e17ad760.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 0xce812b006fa6760c831d07306871508f612954470aa4d102ef160fba46dbbe7a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:25Z), 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/GBKPL2164008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18cc58b0cf77d2d2b86a1651087221c6979c18c3400be11a8a2d62023810584. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKPL2170431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d0fe7e6a1e0d67e1e9612e404ea549a6a51df94e94aff18a1f9c73d24e04a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKPL2173591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd309f7b5595ab602ba8701d67285e5f00adba7c3120b7243390303a3a60d970. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM4TW2355000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793d4046b4dc3e9caca3447f18bd44657c0825fa490164a8e6abe20bf422a045. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:22:15Z), 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/QM6P42399902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10613678a95cbf7a6efb70cf254b7c94ca2aaa07e99a8907b8a22503b1654ca. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:59Z), 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/QMBZ92405290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d36e347ff5f8ffce5a0e9ebf947ba36a73ee0115bc33c539925b28c747b985. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM4TW2561163.