Leo Nucci (born 16 April 1942) is an Italian operatic baritone, particularly associated with Verdi and Verismo roles. Biography Born at Castiglione dei Pepoli, near Bologna, Nucci studied with Gius
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 0x079bed5381413e9472b3272ead7045627462339dc76c490d27d1b0efeb045b85. 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/17ac504d-cf21-47bb-81fe-dd2aac5b02c1.json and https://artists.proofprofile.net/proofs/artist/17ac504d-cf21-47bb-81fe-dd2aac5b02c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestra del Maggio Musicale Fiorentino
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 0xa85ff05f7bd258f4c9365011eb0e15fdf94cb50c2d747ea13ff3803235d40a21. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220691.
La traviata, Act I: Dell’invito trascorsa è già l’ora (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d9f28c5670e5a82d91a5f3763dd008a2c400df2b5537fa7f2be918178a3350. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220659.
La traviata, Act I: Dunque a te, un brindisi! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b24590c82bd84c98f7fa4df2b023b553d63c176cb6b7a620f38a0e19fc74670. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220660.
La traviata, Act I: Che è cio?...Voi qui? (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8343ab9584049446994486aeeea8718c0dbb56299be3b4f6f019a93ef52db. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220661.
La traviata, Act I: Un dì, felice, eterea (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531c92c213076321437533f32c476f657f6efb7a3413f93f5c49ef080eb0dc23. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220662.
La traviata, Act I: Ebben, che diavol fate? (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bd2a688c3c1062f360b287afbd2e6cef198113835649f508f5fa7c159c06cc. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ITN322220663.
La traviata, Act I: Si ridesta in ciel l’aurora (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a0e06ea434dbfb00cb2b750d84c960ae3ac9eda5febc753a1481a83e0a94a8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITN322220664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b26300465ffd4f762ffd3bfb250634566bf44c5a8b5b5e5b15a2a432a5f51a6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220665.
La traviata, Act I: Ah, forse è lui (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0993c5c232407db58d1fe2c59c07834be55bf0127cf5dd5c3f959469bbbbf70. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220666.
La traviata, Act I: Sempre libera degg’io (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f5b00957cbeab9ef61acd14275595077e1a185449c9090492956315e396459. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220667.
La traviata, Act II: Lunge da lei...de’ miei bollenti spiriti (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b3fed89987f96728feb32d8774645140eea17da78c0a5d92a8052ea9dd0f5d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220668.
La traviata, Act II: Annina, donde vieni? (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1385fd4eb11944569c307a2d35f90e6c5d1af729d66fd27af0d7a5b16320f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITN322220669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4626ffea0383e7da3073fd176350886591fa4210879250494b3b5042674f133. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220670.
La traviata, Act II: Madamigella Valery? (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caa843175d216b288bec03b01ac404b94e3a5f51ed5b8ec428667923b06b263. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220671.
La traviata, Act II: Pura siccome un angelo (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2667116a5a67747a94f87124160606aebf9332a13b088ab62744849dc568f078. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220672.
La traviata, Act II: Un dì quando le veneri (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68f1cff76bf7246ecb5c9af0d3f02a389f414f11a984823abf133b84dc1967f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220673.
La traviata, Act II: Ah, dite alla giovine (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145c7b445683ce7f30da6fdad8358909282463f1cd609e5738ff6d53725bb744. 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/ITN322220674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8903e7a171a45e800c228ccbaaf3ad2ea889a7a08733a532434fdfdf7b0e036. 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/ITN322220675.
La traviata, Act II: Dammi tu forza, o cielo (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69a263120aee6c841be10117ff1ffe823dd092d35bfc0b64b7b3035e03dec4d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITN322220676.
La traviata, Act II: Ah, vive sol quel core (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e76d26de9fe86999058ffa403e3ba7c254a570b40ba74c9ed0f9d1c16ec9b60. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITN322220677.
La traviata, Act II: Di provenza il mar, il suol (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9def152961f048425880080d7c3fe917a132d6f5594f58cb6e454600ef74c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ITN322220678.
La traviata, Act II: No, non udrai rimprover (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcb973015a2860bcfd5220d6bd2c84700b5102dd41c52a6edb65f719a4ea796. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220679.
La traviata, Act II: Avrem lieta di maschere la notte (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3565522f751df1933e80d52f0ce04b11c213073f1e84a1684b4bd51947ae39d1. 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/ITN322220680.
La traviata, Act II: Di Madride noi siam mattadori (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e951e208d9bfff85d43618e30888dbe77f2b84a47c6184ac598e1f6bf2e7c75. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220681.
La traviata, Act II: Alfredo! Voi! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc933ac1cb70cbc022a3c1df9eeecaf0f38f5bfea1be866322e332e91cebaecc7. 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/ITN322220682.
La traviata, Act II: Invitato a qui seguirmi (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ded79b17ebe990b5e36b17f25285ab534ae036ad86845fe32410912bb0f78. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ITN322220683.
La traviata, Act II: Di sprezzo degno sé stesso rende (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e048e250657f9fe193e7ab0c57a3351c02078d8fc542ad513d01e48424557b. 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/ITN322220684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9b5c203874c19217dd7fd6ae4910ee07e81188cfc70f421da67eb774b9db73. 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/ITN322220685.
La traviata, Act III: Teneste la promessa (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dba4e5ab551db921821ecbc29b2be62ee6f46a4ba0e503dd46191821691109. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220686.
La traviata, Act III: Addio del passato (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed74efcfe77f57222b065573c2a088815c108335f10449ba3d9d452a6100dbd3. 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/ITN322220687.
La traviata, Act III: Largo al quadrupede (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745263ad81bd866aaf480e6d7a4a4c60743e1b773e74ed3d82cfe48bf9da5e53. 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/ITN322220688.
La traviata, Act III: Parigi, o cara, noi lasceremo (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4b761ea54d70b7e3066a4c60ee440cd93e993cc3d8e6a14c3fbe7394e872d1. 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/ITN322220689.
La traviata, Act III: Ma se tornando...gran Dio morir sì giovane (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f3bcb292f967e84c6534b49f404e18327155f55bdd8be9b7bc7a653f8c51ca. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ITN322220690.
La traviata, Act III: Ah, Violetta! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8550b0a4e7afa54ee431143fb405f9e9dd6cdaac5d24e5f0dd3eb0d0af536686. 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/ITN322220692.
La traviata, Act III: Prendi, questa è l’immagine (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc28e7e7a04f89ecc0cac55ca0f4e39cc0b54cf71b169bbde5f6c1694a94e5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITN322220693.
Otello / Act 2: "Sì, pel ciel marmoreo giuro!" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aa0de024b4d8b9fdeb249f97828f82daace0bcc0a3574ad864b415049f545d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBF079140423.
Il barbiere di Siviglia / Act 1: "Largo al factotum"
Orchestra del Teatro Comunale di Bologna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfb6ea7d62e80f95713a500023c478b55a041c5249c179f8823b0cdd932b2b9. 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/GBF078840805.