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 0x4bb094614032490c0c3d7724c1842b4e075a310698ae1ded7baea64010b1e837. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60880a01-581f-40b1-9f9d-7df7c1178498.json and https://artists.proofprofile.net/proofs/artist/60880a01-581f-40b1-9f9d-7df7c1178498.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Périchole, Acte I: Finale. Oh ! là ! hé !... holà ! de là-bas
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 0xc2c930fe4b5b430046f668ab89b74a287301379b4e9b07698a812b52af6a48cd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ES75S1900118.
La Périchole, Acte I: Suite du Finale. Mon Dieu !... que de cérémonie !...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590f5b14d840a77bfb132665e293e40ded12dd0f31574f19202957c2ffb0ba62. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES75S1900122.
Richard Cœur de lion, Acte I: Richard Cœur de Lion, Act I Scenes 2 and 3: Air. Ô Richard, Ô mon Roi ! (Blondel, Williams, Guillot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d756f10b31950a1f74f50359180ce5265d7cd9cf4a0708bae239ddf485f4d4d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR9W12017467.
Richard Cœur de lion, Acte I: Richard Cœur de Lion, Act I Scenes 3 to 6: Morceau d'ensemble. Quoi, de la part du gouverneur (Williams, Guillot, Blondel, Laurette, Antonio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fecddfc48dc4805ea3acb1ec97d340cf83a23c6472ec447bf57172e76bd19d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR9W12017468.