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 0x527529e3b3130695e2c303229e53fdc83db08a2996f84e8b7fc4a592c63c2869. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c53e1dd5-aa09-42b5-9a26-dadabe302f27.json and https://artists.proofprofile.net/proofs/artist/c53e1dd5-aa09-42b5-9a26-dadabe302f27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Floriane Hasler - Queen Elisabeth Competition: Voice 2023 (Live)
Médée, H. 491, Prologue: Air et trio. "Le ciel dans vos vœux s'intéresse"
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 0xf6193b97c6c6331d2fcdc32bd1fe1b76217ec6797e3fe1d5bf9262cbc56275c4. 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/FR50X2302005.
Vespro della Beata Vergine, SV 206: Faux-bourdon Lauda Jerusalem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3085801b75bb621cb0d5ecf5ee7db9cdb54eba7a21e36138a7c5311f442d5628. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR50X1855221.
L'Egisto, Act I Scene 8: Col mio volto lusinghiero (Bellezza, Volupia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731dc8e5fc06999cf64236792ddf445329623f90542273b98b4d7fac9b76b77b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR9W12300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857fcc5d4e5721f047d8f6578fa931178c5a7e552802bae9552b003349c5dfbb. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBAYC1902645.
Iphigénie en Tauride, Prologue, Scene 2: Récit. Apollon occupé du soin de l'univers
Desmarest & Campra: Iphigénie en Tauride
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e58fbb6df836fa1a13070b4c65cf83f4168ae3e55afdae1d9a91540ab1d1ef. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FR50X2410613.