Natale de Carolis (born 25 July 1957 in Anagni) is an Italian operatic baritone, who has had an active career in major opera houses internationally since the early 1980s. He is particularly associated
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 0xa633f69bb9f41696fa4098ef38dc514516cd24e6fcc1f37774d8c9db6669958c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7ccb0fe-7b0a-460c-a089-7fd41204b7fe.json and https://artists.proofprofile.net/proofs/artist/d7ccb0fe-7b0a-460c-a089-7fd41204b7fe.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Don Giovanni, K. 527, Act I Scene 3: Giovinette, che fate all'amore (Zerlina, Coro, Masetto)
Konzertvereinigung der Wiener Staatsopernchor
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 0xfe6b87c114b0d0f0572423e2f1aa71d9d3aba80b4c4a21b6585163391ad7991e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC9004375 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 3: Ho capito, signor si! (Masetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5663db6487a4c4d3bc254b4b545b5f1a702c9e232ee851d717dcd825c9d72ebf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBAYC9004377 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 3: Manco sale e partita (Don Giovanni, Leporello, Masetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00a2197c928e326aa31c0422facd834464ff14ac5b793f02dd0162686c9226d. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBAYC9004376 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 5: Trema, treme, o scellerato! (Tutti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d822dcc599decdd803d5f569d41b9bf5f9339bef3b856f22183f0c3470ab10f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAYC9004404 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 4: Presto, presto, pria ch'si venga (Masetto, Zerlina, Don Giovanni, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c1a8de15cc8836b8c4384a17a768014f990c2c4db3f15c023eede050d28074. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBAYC9004395 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 5: Riposate, vezzose ragazze (Don Giovanni, Leporello, Masetto, Zerlina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58d9f62e7e73dd28174929f80042f89d1a383609272fd086dd753b1f020ce83. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBAYC9004400 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 4: Tra quest'arbori celata (Zerlina, Don Giovanni, Masetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50d8558baf4981754ed4490d3203f759677ad326628b54b5ac74b8d3ef24ea0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004396 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 5: Ricominciate il suono! (Don Giovanni, Leporello, Donna Elvira, Donna Anna, Don Ottavio, Masetto, Zerlina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5815e89bb3349f91cf98d8b9ce56a7b717f65a0d865b8f38b6c7fde9b6765ff. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBAYC9004402 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 4: Masetto, senti un po'! (Zerlina, Masetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea98a96758d00926dd2625d38f3ee9631368393d14b576d66fe26fc8b0e0040. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBAYC9004392 — a six-check JSON result.
Don Giovanni, K. 527, Act I Scene 4: Guarda un po' (Masetto, Don Giovanni, Zerlina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfe8258682bf1f6452b7755852b6b741e9426ce6f39870a40bcae5b38eac733. 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/GBAYC9004394 — a six-check JSON result.
Don Giovanni, K. 527, Act II Scene 1: Ahi, ahi! la testa mia! (Masetto, Don Giovanni, Zerlina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890586762303fcbab36e37fdceeffb241a6b025edf1b38233117705a71619191. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBAYC9004416 — a six-check JSON result.
Don Giovanni, K. 527, Act II Scene 1: Non ci stanchiamo (Masetto, Don Giovanni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b01d73f8ad39e0e78e69997a6efeeffd95441eb1a9f5a85613fa834decba5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAYC9004413 — a six-check JSON result.
Don Giovanni, K. 527, Act II Scene 1: Zitto, lascia ch'io senta! (Don Giovanni, Masetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6bd0d0b108747c4e97b2b9586eb5fac1f9ff431fd79c1d6fbc180ce287cb8e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBAYC9004415 — a six-check JSON result.
Mozart: Don Giovanni, K. 527, Act 2: Epilogo. "Questo è il fin di chi fa mal!" (Donna Elvira, Donna Anna, Zerlina, Don Ottavio, Masetto, Leporello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392ec66ec970f7d731ddf7a1d9f90b866d54acca3b463eea0353402aa2349ad4. 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/GBAYC9004442 — a six-check JSON result.