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 0xfa33c38eb6f9ae8846b45ac8800984599a8efc3b309a0ed23f9551795d786c63. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fbf0602-01d3-4d19-b370-a93f97f4ded2.json and https://artists.proofprofile.net/proofs/artist/8fbf0602-01d3-4d19-b370-a93f97f4ded2.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 0x3ba72f594cbcafe5fbcde90f582d7ff307a97b8bc617248ce7041f2b26b0c974. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/HUA612101364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bda44a213433723680cd075e015777632acd1d7550cb7674c56b98435bede7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:45Z), 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/HUA612201617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5898bd468d215ac6fe5c85c22d47ffbdd86fc3af363d15612020bf08c0d7b0dc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:44:17Z), 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/HUA612202828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e48aaff2f863b5f86cfbde084b9ec26541197af06f02dc369b2501fe655a5c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:05:17Z), 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/HUA612400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d85591264c4ff0cd870c109c68b51fec28173410bbdf1b3d04c40d5ec4e3caf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HUA612302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38d88c995376bb01290d1fdcaa28d546bf3d15f90d75428b3d5c17162353764. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/HUA612400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9953511efeba65e18408dbbe55bb2a5d6f9ca0f3cd2050fb56008803eeee56e3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:02Z), 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/HUA612500768.