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 0xc36f3ecaaa74cf9c84d61b647448651e7a153945031de54ef74a30976e995843. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d06e8008-61b2-40bf-88f4-789f848f09fc.json and https://artists.proofprofile.net/proofs/artist/d06e8008-61b2-40bf-88f4-789f848f09fc.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 0x83c07811ba3eb2a76076df2bc98341349a447d75e529b0c9f1eb0dbc53267e98. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:35Z), 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/QMBZ92447682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ca04bc2b2a733e75f742660103b9fbe12dc5727c0c1b29ca454230397a5aab. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:10:48Z), 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/QMDA62425298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc39e2acb49adda54a609c38268a01aced8ba2b19964f418a80c57f9dc6bdbd2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:33:01Z), 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/QM6MZ2511551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384fcbfebb9efc2676706fda30c7b3bcf3a9ea168e5e96862588171d93f43802. 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/QM6MZ2511553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35e8d110a2017875f98d4ffd6e8d5e6f09cd523d535ff48ba04a560e6bd83b1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM6MZ2511554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6143bc6bd229a330735a59af849aa1a16644d35a8a9b2578dd62947b3f3cede. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBSMU6479872.