Vasilisa Berzhanskaya (Russian: Василиса Михайловна Бержанская; born 13 December 1993) is a Russian operatic mezzo-soprano. Her repertoire encompasses roles of the Italian bel canto of Rossini and Bel
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 0xf5cf94596e85a643645abd12d965566286464f121e298c10a066391e7097be1b. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d13d5075-a2ca-484b-9b52-e7982e015b4f.json and https://artists.proofprofile.net/proofs/artist/d13d5075-a2ca-484b-9b52-e7982e015b4f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
L'italiana in Algeri: Atto I. Cavatina. Cruda sorte!
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 0xe3e64b512ef8d4fbfdc700e4d04ed6fbb44dd12627574484c85a58ebb10c9d69. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES7892300408 — a six-check JSON result.
L'italiana in Algeri: Atto I. Recitativo. Già ci siam. Tanto fa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a0e960f9bb30674b2bb67340c328d63b05b78a01baaaa21dd35cf71320794e. 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/ES7892300409 — a six-check JSON result.
L'italiana in Algeri: Atto I. Recitativo. Ah! Isabella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1c5ce81d4983499ef644b6586e6b9a4c05b83bf1522f5bd3a8333773179d14. 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/ES7892300410 — a six-check JSON result.
L'italiana in Algeri: Atto I. Duetto. Ai capricci della sorte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa601a3f0c393b1eb5daa9de040da9553a6e169932fa33abce82dd263700213b8. 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/ES7892300411 — a six-check JSON result.
L'italiana in Algeri: Atto I. Finale I. Duettino: Oh! Que muso, que figura!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4391207d4d9d5ad574cc24278c4373ebaa30ef0d4254587249c58110e23608e. 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/ES7892300416 — a six-check JSON result.
L'italiana in Algeri: Atto I. Finale I. Quartettino: Vo’ star con mia nipote
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1cd09aac1de01937cee6198e264b5723ded2dce5e76c321c114e9607685e0. 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/ES7892300417 — a six-check JSON result.
L'italiana in Algeri: Atto I. Finale I. Settimino & Stretta. Pria di dividerci
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3636f610f31892adc74dcb92d7fb92f6efe63ec0497759f74d28ea0d74798350. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7892300418 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Recitativo. Qual disdetta è la mia!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbacf0cf20fefb8501ceeca061f74038a8b5238796a0698ae9771b25cb18e988. 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/ES7892300421 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Recitativo. Dunque a momenti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde019ea5ff94970461831e927953b36227eaed21752d69a3e21652fc068ab8e3. 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/ES7892300427 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Cavatina. Per lui che adoro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6406f933613357b6677e7861a847e7ff8813efc98cfd8592ca1d28f084bd93de. 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/ES7892300428 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Quintetto: Ti presento di mia man
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf178bd0795f83b66ba7995dfe5f790c347284c6de4001aa28a3cd03244a53bc1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7892300430 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Recitativo. Amici, in ogni evento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c2cacb86cbdd4d4e47c27400ea0735e368d131becca33ef8af9b69e627671f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ES7892300438 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Rondo. Pensa alla patria, e intrepido
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cd7c6b423e18ae46272f32a03e6acf16103559fa46a86d5e73a3162635ff21. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7892300439 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Finale Ii. Quartetto: Non sei tu che il grado eletto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f32ca4e6d175042c481ca415acfdf2a665bfd7017d9d4ac67326c8405d266db. 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/ES7892300442 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Finale Ii. Son l’aure seconde, son placide l’onde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bb1efb67cf839a580c6077ec0281f01a4a05188a6acc890fa9333e61720052. 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/ES7892300443 — a six-check JSON result.
L'italiana in Algeri: Atto Ii. Finale Ii. Mio Signore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9be2c21b1e877fd363364e85095528a25442fa672088c28ceb65abeec2a279. 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/ES7892300444 — a six-check JSON result.
Arsilda, RV 700, Act I Scene 1: Recitativo. Figli, non men che miei vassalli (Lisea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda79011255c39fcea5aa3b5b41030167e5321ced1b22adf9206d8aa4c695dbeb. 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/FRZ132424006 — a six-check JSON result.
Arsilda, RV 700, Act I Scene 1: Recitativo. Questa, o fidi è mia sposa (Lisea, Nicandro, Mirinda, Cisardo, Arsilda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559f5ea3feacc84fcb85e2afccb320db79c92f3c09c9057b42d0b8d789d4fca. 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/FRZ132424007 — a six-check JSON result.
Arsilda, RV 700, Act I Scene 2: Recitativo. Sposa. A che tal mi chiami (Lisea, Arsilda, Nicandro, Mirinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e37d9f9fcf3426d6d42d61de70844dd8c93f13a8056aebf7d0ea2678d40abc. 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/FRZ132424009 — a six-check JSON result.
Arsilda, RV 700, Act I Scene 3: Recitativo. Sol di Bitinia il Prence (Lisea, Nicandro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e92d0b1c90ba363fb866749ace0c62018f1a398e2d5d826db1da14b73a69373. 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/FRZ132424011 — a six-check JSON result.