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 0x434da0e7f36ef92e35f6e0a0fbbd550aae1bd1b2aa35906413ea7db95e66409d. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/116e154d-8461-4c6d-bc63-a5ddbdbc7fc7.json and https://artists.proofprofile.net/proofs/artist/116e154d-8461-4c6d-bc63-a5ddbdbc7fc7.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 0xc7c54c2316bf06232f7a2b769eaf728530555b754f7fc6f48564968b227ca5a3. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZPLR2104043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f70b143e602ca6d09a134ed0b374acae8eb827cf668b7f4e779a44c1b1b74. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMER2201285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6335c9620293074564cdb18e8e4d3be9b79a2ecbfc66b25a93a5a55cadc325b2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN62371069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabe13a460a6a5e60d4eb77a2610ce80022ef9d59c8bcda53e75d1ab8fe90ecc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZPLS2377330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f33379436c24c2c09980a475d1c3329ab210217a3409a62b11766dcfb3748b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:04Z), 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/QZK6J2454328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecabffb6d68ab5f0858dfff5b1799f941b21f0427776f36bb506e0c19298dd9. 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/QZTAT2553490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ee4728a1a2d6c86118754371b46914b506bc6cca761f88e6d9c309d06dac9. 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/QZWFF2592357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78602a914bb012de51115cca01ae3b56886e4f0409dc04098b796cc6d28a0c39. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ772592005.