Eugenia Ratti (5 April 1933 – 14 November 2020)Muere a los 87 años la soprano Eugenia Ratti was an Italian soprano, particularly associated with the Italian repertory. A lyric coloratura soprano of c
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 0x35a99b2d2c5015da6fb5503b2d149ff5dab511205ebd5dac574342cc2bf98f39. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b935c36-4ab9-408b-9c8f-3d7965275d2c.json and https://artists.proofprofile.net/proofs/artist/6b935c36-4ab9-408b-9c8f-3d7965275d2c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Verdi: Un ballo in maschera, Act 1: "S'avanza il Conte" (Oscar, Riccardo)
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 0x39a92f5ec64d8a8976194bf8ba9bbbba885933cd3b11a8e81cfa155c0bd6c642. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401191 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "La rivedrà nell’estasi" (Riccardo, Oscar, Coro, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b081880bb3db82f5c177c3ddd3cd22b86728f5e97c104de3fd8e9c449a809fd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401192 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Il primo giudice" (Oscar, Riccardo, Giudice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b370797d4c176fba69ccc8bd5ca63751de5cb7accf93849748cfdb8d2cd9ea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401195 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Volta la terrea" (Oscar, Riccardo, Giudice, Renato, Samuel, Tom, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42177bff9948b034942f6e6ee1e9297fcdd2a4c0dbc4bb54006c0a5313f38b9a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401196 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Ogni cura si doni al diletto" (Riccardo, Renato, Oscar, Samuel, Tom, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43714979ac6d40b74b86d21b881a9c9071fd28d89a313946610ddb74ab4b0c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401197 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Su, profetessa, monta il treppiè" (Coro, Oscar, Riccardo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc248f7d55ab823fef5e3721dd19910d075f82eab125b3430b32c095d765864. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401206 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Chi voi siate, l'audace parola" (Ulrica, Riccardo, Samuel, Oscar, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d60233db6a4a15e521ef27db06c4447a5b3038d2b2dc40e8391611fca8786. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401208 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "È scherzo od è follia" (Riccardo, Ulrica, Samuel, Tom, Oscar, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1b83b4409d470514c7b4bc167437836c64df9db5d29213899d7285be4c4ef. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401209 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Finisci il vaticinio" (Riccardo, Ulrica, Coro, Samuel, Tom, Silvano, Oscar, Renato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276df6e350eaab50cdb6bfdbc590b3f23e785a3a8ac4bf1c49a9b1fcd507480. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401210 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 3: "Il messaggio entri" (Renato, Oscar, Amelia, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ce4be951fab3a2a55b29615e92a33cd020aad0f26fdba9d41faea0023c446. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401501 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 3: "Ah! Di che fulgor, che musiche" (Renato, Oscar, Amelia, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222c9c56d460790e6ab45c5cf037be6e443b2c03be71c16195291299f358be5c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401502 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 3: "Ah! dessa è là" (Riccardo, Oscar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08571cde2b20daf6e4e90d4d414c0eb3e55010e165e7c1102cf5b99815de5db8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401505 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 3: "Fervono amori e danze" (Coro, Samuel, Renato, Tom, Oscar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c56a20a3a08efb51c641d61db2be415449ba503f59b886ff392c5410fafa2b9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401506 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 3: "Saper vorreste di che si veste" (Oscar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb833af03f6c8c933d5bafcd51336a286fa918a1a7ad556df335f4b921fae877. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401507 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 3: "E tu ricevi il mio!" (Renato, Riccardo, Amelia, Oscar, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b2b543edcaf5a2ec6fcc0eb28f6b0f2e9a65e3c73e3531430a07a28ae220f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401510 — a six-check JSON result.