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 0xdf31db119cee94ce5a983cf882c142f934901588a251d952f25dd4c93f6d748a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85c5e192-e0dc-4b5c-8d11-f5199988ddee.json and https://artists.proofprofile.net/proofs/artist/85c5e192-e0dc-4b5c-8d11-f5199988ddee.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 0x423c97d01e6afb632eaab581cfa3f7dca32245b328d6a8aa1ce2fad48796f846. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/TCAEO1995097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5714fae3ba971ac7dddd2cc6b6ef36a4f69c5971323816487cfeec0dfdc3ee. 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/TCAFF2034008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6227ce025551d571312d5db83a175b95e8dfca6212d45253fc6091fcb4460e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAFX2143001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b439d70d5727ca328c95ce1d848e444071ab6b668b556b44a6115ba0a66e5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:41:01Z), 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/TCAGF2213757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f8aa7ab6ddfe4b7b26e4a3ae399fba5a09d733a9ba3f3d285f60b0fd5a4a2d. 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/TCAHD2396101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09be032eeb8c804bcbe6187bc047c0a964b2d21355d903cae30b4ae1a0bd82. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAID2405277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f55b5f42399554ce20641d426cbff13f00cf052fb30be5160aadc55ba6c5b56. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCAIG2480443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa245588d7fe840d6bc2eb699c4e33d7ed1036a69a2535346bda1ec4441322d95. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:32Z), 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/TCAJL2526285.