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 0xd36456ff0cbc62a6c40a9d6fdfe88d19307889b62488c70b5321e9c7f3ba617c. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f21863b8-d175-4e09-b6cd-eb7fde5c89c8.json and https://artists.proofprofile.net/proofs/artist/f21863b8-d175-4e09-b6cd-eb7fde5c89c8.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 0xb484a1a4a91d51064f161fc4f07a52d2c133c403ec2ccb4e84c7a9d55916710c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:49Z), 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/FR6V81826598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b30594f38a19d0e17916d58e7304c179bcf759cf7445ff66e081233c385d91. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR10S1450373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a70cb155acc7400ec0fc1442ec7a045ebdeb1b69fc8aee3f7fbbf9dc7a2bf7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S1450375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bc3bf3306232172880663d0db7a2d453dd6525efdbf70e967ff4bc5324e0c2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR10S1450379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51037a3442abe0cf4dbb99f9a8b0ba063b5c9d253d6806d8d6c0f86ca6fee9b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:43Z), 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/FR9W11712844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cedb94001a334dec20da08114da791acb993168674011fac46c3e6f6daad944. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR9W11712845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b60b8eecd4838d4d3eb6a7e46824f938a61b5b75df6f1209e36fe06e4a2d3. 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/FR0Q12503009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb8af460328ede2291a4578042b2888d9cc4381fffd4dcb37a32759df0f06e9. 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/FR0Q12503006.