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 0x8b13786ac75c985cfd02ccb7e2d90d336d9b24750f625d75ef1e0bbf2d49d7ba. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b61d1977-bb83-487b-9074-7693af50cae3.json and https://artists.proofprofile.net/proofs/artist/b61d1977-bb83-487b-9074-7693af50cae3.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 0xf1671e83e596d2d65351cca85b0ccf0f49cf47ac69235b555e5e666d4fa244a4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFG2407800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097d2d97e2380353d7a13bed1459a0bf7f3ff6c7dc6cc49d78fd42a374f30f0. 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/QZWFG2456237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204aa3c8154ebf8ef40a4c2efa10f61bbc2e9deb1fb3cc14017a1e65aef3c693. 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/QZZ7L2477054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6370b51b8379862317723583f3827a96436dd734abad9893c6d6ea5e1041ff3d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:19:49Z), 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/QZZ7S2445729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21f61226fbca6b970af4e7498268b0cfb0c7bc5684967bb0f6a5da5174b7ce. 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/QZZ7U2413812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b570aa072347d252d8a3da56906a80ee2b2e6596bd4f9d6b12ae338dd6cdac. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:45Z), 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/QZDA52551925.