thumb|Neri as Mephistopheles. Giulio Neri (21 May 1909, in Torrita di Siena – 21 April 1958, in Rome) was an Italian operatic bass, particularly associated with the Italian repertory. Neri studied fi
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 0x1cc41efb07d738fb3c7f7de81ade51cf4917b450bc62b28b69adb74caa6d6fef. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3a382ef-37f6-4d44-ace2-df27baab1f52.json and https://artists.proofprofile.net/proofs/artist/f3a382ef-37f6-4d44-ace2-df27baab1f52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Don Carlos (Recorded 1956) [Live]
Orchestra and Chorus of the Opera in Milano
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 0x6453feb384face2129d6b37d036b5cfa03755a1a0f1fa494e4b042e60b4c1c74. 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/ATP130358014.
Ponchielli: La Gioconda, Op. 9, Act 3: "Prodigio! Incanto!" (Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866534386ea99c83d721ae848d96d23bf909e1bff6562dfc206c4cf728e8a154. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC2203399.
Ponchielli: La Gioconda, Op. 9, Act 3: Dance of the Hours
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2520d2182272341d88a75dc487c3edb94c7006aeb97295f5eba09e3d6e8b5aec. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAYC2203400.
Ponchielli: Gioconda (La) (Callas) (1952)
Verdi: I vespri siciliani (The Sicilian Vespers)
Verdi: Don Carlo (Christoff, Filippeschi, Gobbi) (1954)
Verdi : Luisa Miller : Act 2 "Quando le sere al placido" [ Rodolfo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76878d6682719335023870268a645605262bc5f83ae904bef1d7a349cf21ad77. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITD014801663.
Ponchielli: La Gioconda (1952 - Votto) - Callas Remastered
Ponchielli: La Gioconda, Op. 9, Act 4: "Suicidio!" (Gioconda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa764b6216b97087ab98ecd106e01ea1ffd341dae0d647a63810dd0f1a4138971. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAYC1400067.
Lebendige Vergangenheit - Gianni Poggi II
Lebendige Vergangenheit - Mario Filippeschi
Verdi Historical Opera Edition, Vol. 7: La Forza del Destino, Don Carlo & Aida