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 0xba6046f8ec48960c71dc6de4933e0ff11c9ae473f64429831b75697d939a2fcd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6d94b67-faf2-4574-884f-e558402c0b1f.json and https://artists.proofprofile.net/proofs/artist/f6d94b67-faf2-4574-884f-e558402c0b1f.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 0x940ad86ef52811a44268d406cd0b8ae359b5d865a7179fcaf2c4fb354c4a6a57. 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/QM7282106836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc80dd4a74f42ac468887dbd7d5053bb47255df7e1d5608e841d8df2ddcc300. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCADA1765721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cec288413026f7a4e70870e8987f16997065db24fe6cd922fe8691ed37157e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:30:27Z), 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/QMFME2176577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02620356ab1defa51b43bed3818070d7703a525a0ce42f14c5cf04e772321d61. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QM4TX2262177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69e0ca74621b884c2d39387a12c08546b82c1a85b779f9429623eaefad6b1b9. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QMBZ92281640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54cb320e2c2a38a94f0a4e2fcce1990dc44e4cb7fbe8f757af560f58018a4b4. 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/QMFMF2213372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4d64a950525c6587c27b29e4d1a2a3f68339f731d976c250dc8170c4089c8. 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/QM4TW2429272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4333ffcc19c28ed892584f81054fbeff0d11375901ba6080bbb88c7445e3c64. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM6MZ2447213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4d64a950525c6587c27b29e4d1a2a3f68339f731d976c250dc8170c4089c8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2429272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3044060625d173bf61051b450ee23db4c6cc3b8021560e2700cd418827d6638. 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/QM4TX2340872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337685114cff8e7c23c6794adc9ff0acbd78d8e2223cc0ef7467cf3686edd3fb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6MZ2447200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19ab8dbb4e84587a7266533be4926d543687a10984e0e7a45c06215d27580c8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM6MZ2447212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02620356ab1defa51b43bed3818070d7703a525a0ce42f14c5cf04e772321d61. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM4TX2262177.