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 0x65ce0fd66bcfaf89ab66bce30cc479c2fa9e3cd5d2f657b2fbf87fec80424b81. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bce9a55e-28a8-484d-9422-df642336e1bd.json and https://artists.proofprofile.net/proofs/artist/bce9a55e-28a8-484d-9422-df642336e1bd.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 0x296eabce7851f01b005308c71e5f796feb0e056fb2741e6166d89b8cbe8ca16e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN82401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7173313123521dce74a382ae4b79a71a42541578723b972d7a70fb929049c8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:09:07Z), 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/QZMEN2489487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ae40aa0e58f9af270ce978c1112bf9e0812f63b0a9fbfc4e26098110526a03. 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/QZTB42412509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45249438b614d78234be936111a2f311c647d02b41aff8185b000b88074635f0. 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/QZZ7K2458873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d0acc4a01b3d35712e2a198848e2f05a3e1df0524f81d6914abf1b7106a67. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3EY2484565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d7e119eb2bda9472bccd32271f9727a48615142fef7d04efdc27889ebf989. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:51:24Z), 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/QZDA52561888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1637d44f2119696ebc654a0aa2a4d32c604341a95e7a1a2f1c2879d7ebcd16. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:43:34Z), 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/QZES92551351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b04a1c59c00dde06a15cb70de1eccb7c337cd51b8b48099819285b16bc66e7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT3EY2569845.