Riccardo Frizza (born 14 December 1971) is an Italian conductor, particularly known for his work in the Italian operatic repertoire.Foletto, Angelo (17 April 2013). "Frizza dirige Oberto Un Verdi di 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 0xe14a8600bc72e408a4d9b5cfd8b1d75d74a1aa7756473f5416c40f05763dc722. 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/cdae97f8-2ae5-4529-a9f9-d1170ea0741d.json and https://artists.proofprofile.net/proofs/artist/cdae97f8-2ae5-4529-a9f9-d1170ea0741d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
L'amico Fritz, Act I: Son gli orfanelli (Live)
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 0x6b2f1008c4c39e7b6cf7a7c03de350504d5550e31de00b97cbf181e1b7f461d3. 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/ITN322220887 — a six-check JSON result.
L'amico Fritz, Act II: Ah, le belle ciliegie! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282cd065846124869166777830c9b5b5fefdba96397fb92cdafe047e1d208c22. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220888 — a six-check JSON result.
L'amico Fritz, Act III: Amici, ho vinto (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7afba4aa3b3b8862757a88a7ff5fbab40855820b0e62bb3c012eda5857822. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN322220906 — a six-check JSON result.
Opera Arias (Soprano): Ciofi, Patrizia - Traetta, T. / Meyerbeer, G. / Rossini, G. / Donizetti, G. / Piccinni, N. / Massenet, J. / Verdi, G.
La fille du regiment: Act II: Il faut partir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0542605e48c538ac16e92d66135c9b81de797e5044e4cf3ff76086fea8115b6. 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/ITN320903015 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f839615730b026fdc718e74c4908ce7d31823b6be05cf2c40efe85acdecfe6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM11804427 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c65ffc0d93a6f19b3ca671e5c26021d60cee8bdd271f785605b7111c1e96d48. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM11804426 — a six-check JSON result.
L'elisir d'amore / Act 2: "Una furtiva lagrima"
Orchestra Sinfonica di Milano Giuseppe Verdi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c56ad6565958fde33d18f3d41a366e6011f1be90c84abcf2f069a60d5cd38c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBBBA0200400 — a six-check JSON result.
Manon Lescaut, Atto I: "Vedete? Io son fedele"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc496ae8432f61ce143995faef5fdf81d3c14cfae9070360a094783e4f2dc70e5. 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/USSM11804428 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6517ec67af584440c144c9ddfdfcb49822a0942544e12769d8fec8aa9cb897. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM11804431 — a six-check JSON result.
Madama Butterfly, Atto I: "Viene la sera"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6e0dc4e117f3992848c1b5ba5fe28f3d2975e0280e3c0db2922e577f32890e. 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/USSM11804435 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d17a2a4f94caf92b0f993862924ee5edfe167a5132251db95c75052bdcb160. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USSM11804429 — a six-check JSON result.
Manon Lescaut, Atto II: "Tu, tu, amore? Tu?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94f66701d5907e2b5ad83eabfc73a47f9cf653d08812a5a753f7fec6a826f65. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM11804430 — a six-check JSON result.
La Fanciulla del West, Atto II: "Minnie che dolce nome"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d685e36789ddb5785c1e8f2247d28bd03db6bb90a3103f3bb621b841a66e404. 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/USSM11804432 — a six-check JSON result.
Il Tabarro: "Dimmi: perché gli hai chiesto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a504ba5e295d5000d81f88962cf610d1c4b12e873859aad77bbf0c693f4b32. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11804433 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe4da3f2c682017b91422548d15f00996b34c84dfab8a16095cd5da7f008b1c. 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/USSM11804434 — a six-check JSON result.