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 0x284b6ff7f3f31afe2305617958e51a8758c8721f7df909204b417291fd9aa657. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b9f29fe-46b3-41fe-8743-063eb19b5983.json and https://artists.proofprofile.net/proofs/artist/3b9f29fe-46b3-41fe-8743-063eb19b5983.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 0xfeb6900dca1579c3a4ba0e38ff29a4d10720d340e1a6189b7b9cf2d40b92a06b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:46Z), 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/QZNWU2559738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca0cede24868a928f76bf232c1ff5722b3b138d94c697f9e2fbde7e6769916. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWU2559740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdb06904a1ef3c8cc9e5add304284b1a10da2df08a57e6d1647aa1e942f6bb8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:21:19Z), 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/QZNWU2559742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6a9402b80441d3a198de3162531f412a6143a60a862c8eb0f27dff03161b8e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWU2559744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3733687b8b8dfbbe8dd26de67312c2879a7b6a485708b81052d663a6cf46b0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWU2559747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69914e64a46e9d783ef2d08cb8d5b422bbc77b334accf62f6dfb971570cfe63f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNWU2559749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb2997cc5c61eb62f5c060ee48a51edd723b0fa07717dcd95192d69e22de931. 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/QZNWU2559751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13d45b2ef871be59468319a2650582ae6ae142e795a8de0231e254cf6510ddf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:36:35Z), 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/QZNWU2559752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d30e34fbfb908ab3d9e1c4f6fdd2f93bd075a46830473dbe37ca939b1797a90. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZNWU2559753.