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 0xbacb1a4d6c74a708a8e1cd84c36fc50645fe36a1c96fc809ba5f1496652169de. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbbb78a5-6526-4cec-8444-cef9f85cfc4e.json and https://artists.proofprofile.net/proofs/artist/dbbb78a5-6526-4cec-8444-cef9f85cfc4e.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 0xe91a812aba9755f29c02df0e8594d3dcdcad373e00fd26363d2ace6bbc0cd957. 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/QZTBD2465689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24358236a97ce1a87906c64a205a2e5ce83f4c209252d28c7e9b4d8eefe0fb4a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAY2487988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f681cd29b42814aa902a0b4648238e90a09375b07b82a815f3720bde57f363. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFN2458480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91a812aba9755f29c02df0e8594d3dcdcad373e00fd26363d2ace6bbc0cd957. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBD2465689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4b0d9525aec04a1d8305fa641277ec0653b39552aa002dcba7a0c3179e1b88. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWV2446105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd174b23518930f79630bb608f225657184d3fae4e4ea7864bfe5b7f093d1cbe9. 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/QZHNC2572937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694a3f5533feb85db2829003bb4670f0a74bfce2745d5264d95d0c107795e05c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6K2569106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62c5b32b9aa89082abb33ea28f76e2cec3ea387d7958bcd74455df1f2fa5e28. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWX2573560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582e308f167ab132975ca2dd601d0f752adcaa0f9c05845ea8ae521389bb52b0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZRP42591481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a08fbcec17c64f791b92307cea32425c2fd083b543c66c16e5f29488647c918. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZZ7Q2556369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe904a01ff9715e6f6f372ce5a978894b3aff6cb85664e1749e5388a0eabb97. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFV2421061.