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 0x500b3f31ce5772880d59b6060bdfd924a24c25999023486c96caf04b981fb52b. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7379d08-b46f-4309-9385-f126d37da80b.json and https://artists.proofprofile.net/proofs/artist/d7379d08-b46f-4309-9385-f126d37da80b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Un ballo in maschera: "La rivedrà nell' estasi"
Verdi: Un ballo in maschera (Highlights)
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 0xaae16aad58ea706eac8cb534536d92a453edde54db2f48e511c8680384be8bce. 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/GBF078311190.
Verdi: Rigoletto, Act 1: "Gran nuova! Gran nuova!" (Marullo, Borsa, Chorus, Duca, Rigoletto, Ceprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e7a1f53f11e3a1f0bd014b7e7960cbd1884daf3fb960d00ece8c7734cd7c3. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBAYC9602433.
La Damnation de Faust, Op. 24, H 111 / Pt. 2: Choeur de buveurs: Oh! qu'il fait bon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73434bcddb02005fcae650c03a483cf1625a12cb4e56053c28423638484ea7f. 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/GBF078140609.
La Damnation de Faust, Op. 24, H 111 / Pt. 2: Chanson de Brander. "Certain rat, dans une cuisine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e507f8beaebb436f4b7a13662264e98344716d3c9db1fe8e8e064ad0f2eb7fa. 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/GBF078140610.