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 0x0bfb5dd80d731e650f5e550e668d2d9d8c8f0274a225565f1b2177fe306e0efb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c43c452-717a-4376-8bc5-b181655f1bcc.json and https://artists.proofprofile.net/proofs/artist/2c43c452-717a-4376-8bc5-b181655f1bcc.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 0xe4c7c1402834cdd7f38d52c620e37f1a94aad85601c42c7a96e0e3da74c16d58. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USRMC1410853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274a51fffaeae6ef520b6b0bcf61202703b376887163ac3b0dbc4ce8a70a163. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USRMC1410854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3352d7b59857a420abd85b0274485c7969485038e53812007a72c871da0894d0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USRMC1410857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf499d0ffa440d9f14df89cff9d139b4ce5a89070c42cd05e7d7b3fa47f7cc88a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USRMC1410758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5dd0e39e71edbbf494b36c29d657342dfd6c560c343f48cc50cecb9a40852. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:59Z), 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/USRMC1410860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9334b4de8492a4062f80035d0226bfec211a8a217c4add8b4b4bc95f19738c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB82371377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ff0e2ecbd36c12b502b8ec1c2235c3bbacadc102a63b638831f9f29b62b660. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62407563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b675c14a41841e60258ed229acea0389b83552fbb2668217849fe262494028. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWY2464482.