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 0xca6f253326fb88ff414c77ffac5349243e6aff031a9a6fe740761b4eea7fe16e. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d0c102f-96aa-4d19-836e-72052a692454.json and https://artists.proofprofile.net/proofs/artist/6d0c102f-96aa-4d19-836e-72052a692454.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 0x8455d7aafb3306b7a33321e7d03e7692563866ed935672f2ebe18c843f27ef61. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:28Z), 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/QZMEN2437141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ea656ecc08be603bc322cbc99eef99e71cbb0718525ff10d6d6aea358a23b2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:01Z), 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/QZMEN2437142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb2ef89e39806f0e1c1f28d8315a1436173f401d325b2de08380e25d24c0e2e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:46Z), 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/QZMEN2437143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d442c0492c258f54f0f64cdf44ffbadf949c7caad4667e0b721b614880def0d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:27:22Z), 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/QZMEN2437144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741accb0954fb507f898e3757d9b6dfb3670ffdc8470cc39b4bb92ba98e4c9c7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZMEN2437145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d21ec6c20e9eae28b211a154a1570bae43b7117a32046587146eb27c6b202d8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMEN2437147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e34ff6676e65c0bb4ab5d8df938d1b2f6295495d4f6aeb05274cfcc6db27c9a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEN2437148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc888635caac9cdf301e66495faf0b53e689d2ebcaef591b65f88aba41c23ab50. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEN2437149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7e1016968fc544ae5ddbe86108448b0a518c57e2d08d9443d422bca9e1ef93. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEN2437150.