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 0xf519d4f2f9af2c2deb3dfd9454142381ba935ccffe2690f055ee47432b4462e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/267ece14-bdc4-4a71-b949-59ad11bd487a.json and https://artists.proofprofile.net/proofs/artist/267ece14-bdc4-4a71-b949-59ad11bd487a.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 0x316c89afc6c6ee0c2a0e88bb491b2fd09cec14d1ceb24f98b830fc0c85011b89. 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/USLD91757639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1be993bad7b829a8427b5278dfec6c6957fa4c0133deefd4c391ecec44380. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB52488682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7e426c7a7093aaf8afaeaf93ce50ceaf32492df220276fb89227ecd0a7a8b8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNMX2415496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9a65d42caed8ea5d658b2105083b264f8e983f7d17046193f32d3111b748a3. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:13:41Z), 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/QZNMX2473913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432d319ce6738317c66f7738f54b969682c42a3ed20ede1cec0e621f99ab7848. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZJG52519292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28b98f76ce666ab011ea4519b67e4cf7a8450f876d0ff319cb947c7bf538057. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZLL92544972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a74cb70c1a247d9df5978daa67dc6dfd7fb4eb6abbd4ad61a9fae897960f8b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:53Z), 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/QZNB82562081.