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 0xa8a7b3773b046f019da26c736af0145d55f36be9ee0b64e7b6c7e6a34bc99bda. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a24fc174-7c49-4a80-b1fa-a8874ae4e53a.json and https://artists.proofprofile.net/proofs/artist/a24fc174-7c49-4a80-b1fa-a8874ae4e53a.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 0x8550f087675ebf4a35a17f05e5cad52167414a4fde296ca1db9f6dd53090efbd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FXQ292300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ffdf82f549bea7cb8f45862d0443f1066f9f3f0d8e966bb3f1d6e3d0ff219a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:51Z), 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/FXQ292300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77192a39c711eca6496e7d61b012d2cae9e62f359f1e812573cc3c928e68fc34. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FXQ292300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2dbc87e98fd45a735db80d7d7b5ec60bcea507e16459fc32f9d15898c01531. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:11:18Z), 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/FXQ292300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abdd905163b95e61f8cebf8d8ba907589a9b85b81e8c615954bc9291a3a151e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:50Z), 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/FXQ292300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a8e686ab723e2c38930ebbe12e80b6ab30ec02b22c0cdd1bb4f89ee1997d8c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FXQ292300036.