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 0x02fa30c27a04a55668ccd6a9640b25d56cdd39fbee1e566b6c42c3ebfade9a23. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1c7fbe8-df5e-4b8a-bbd7-4cabe71c3334.json and https://artists.proofprofile.net/proofs/artist/a1c7fbe8-df5e-4b8a-bbd7-4cabe71c3334.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 0xdfcf56f6719d69ee48fd9de205802c7dad3131ad3764278c9094a80369dcb56f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:54:07Z), 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/QZNWX2443030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b62254a0dac155c94ac99e60cd9714d7a36c8a965ff15826a2a486d6d4b305. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFW2458183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c778537236fc8f33b4b87aafae4ba380f4a311302daa0f0e47050b972389a4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:17Z), 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/QZZ7P2476252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11c8bf6bfd2d19e01a9dcbf1bdb3aefe09a031b703c1fbcb6a3c99eaef88485. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F32426665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4204c0fd909e15925342a31534596fd329dcdea940b0c31a48e2d16fe8676da. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZES52566081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08439106285a578adf3830aeb7f05b5e1b6937f6d5b89da3e19d19a54fc280e8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWU2527657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e074a2ffcaf08a8a3b1cfbd8ecde9cf62df0831d43b12096d6cd10176395f7. 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/QT3EZ2569707.