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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe30b5a0c102e4c49b23a8177cfab458cc9368df178219d49cae0de71c138b79. 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/6761a255-fe2c-41e4-9bd4-e02b0cce2391.json and https://artists.proofprofile.net/proofs/artist/6761a255-fe2c-41e4-9bd4-e02b0cce2391.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Noël des enfants / Traditionnel et sacré
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887f3d4257c7c45510e455d0cd5edf55ebe67835c302448e5aa979c8edb73b41. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:58Z), 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/FRPAD1001670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3076fbf272b913874cb9ccb93e40ab4f061e7ac1e0c080398ccebc93df7121. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/FRPAD1001740.
Noëls en chœur / Les polysons chantent Noël (Inclus 9 versions instrumentales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58587ef664c1a7f394400bb8caee7bcf9b418bb38c503be3fa2073dc2619fe06. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRPAD1001990.
Chœur des polysons / Les plus beaux Noëls
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63125078ee8325d72daf4a246eb89991dc8eaf80158614ba37caf75c1b429c11. 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/FRPAD1001780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942b5e6396622e1110a21ba69894962f5527244e9da6bd08c0d3193366329957. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:50Z), 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/FRPAD1000750.