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 0xf87dcb95d0ad6557ff64025fca5cc50b47b2c8c57ce2ab03c0a6dcaad0a5754c. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3cd8a29-ec7a-4a01-9f84-b97a16e849f6.json and https://artists.proofprofile.net/proofs/artist/e3cd8a29-ec7a-4a01-9f84-b97a16e849f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Singers of the Century: Franco Corelli, Vol. 2 — Young Hero of Italian Opera (Remastered 2016)
Orchestra Sinfonica Nazionale della RAI di Torino
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 0xfab0969f43b364942323ca398b56932bea7eb6c55a34141628b8d3544c258787. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEL111600124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af9c990cbb09d69da48a0d85a656d43f4999fd3bfd8a124dbdd5f2d9e67692. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITCC51101808.
Die Entführung aus dem Serail, K. 384, Act II: Tutte le torture (Sung in Italian) [Live]
Orchestra Sinfonica Nazionale della RAI di Milano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81193dd1401060c2737601c7f8111195ff4185e285fb73071fd54585358b87f2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITJ099561219.
Verdi: Rigoletto, extraits (Mono Version)
Une soirée à la Scala de Milan (Mono Version)
Il mito dell'opera: Giacinto Prandelli (Recorded 1949-1956)
Verdi Historical Opera Edition, Vol. 6: Simon Boccanegra, Aroldo & Un Ballo in Maschera
Ildebrando Pizzetti: Fra Gherardo (1958), Volume 1
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.
Franco Corelli: Power and Beauty, Vol. 3 (1956)
Verismo Arias: Puccini, Mascagni, Giordano, Cilea, Leoncavallo
Andrea Chénier: Come un bel dì di maggio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc7cead56f8e138aea1fc4e67775bf5cd4c91a35260dba1803602b7156730f5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USA370917918.
Andrea Chénier: Un dì all'azzurro spazio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2695a6d63a7330fdce031bc4bfeddea93f6a036f3bb996b14e940ee0cbaa8a0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USA370917919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1c83440edafc8b028beabee90d084b8d508db92408d2c8c30bf2f3ebb28b5. 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/USA370917923.
Puccini: Madame Butterfly, extraits (Mono Version)
Highlights from Puccini's Madame Butterfly