Dorina Frati is an Italian classical mandolin player. She performs regularly with European orchestras such as The Philharmonic of La Scala, the National Academy of Santa Cecilia, the National Orchestr
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 0xf9accd6cda10c28fcd12db5add09084bf39228fc896513d78540e9d086180d0e. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20b785ab-bc0e-4607-a8e3-65fb12ede6bc.json and https://artists.proofprofile.net/proofs/artist/20b785ab-bc0e-4607-a8e3-65fb12ede6bc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Trumpet Concerto in D Major, FWV L:D1: I. Allegro
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 0xa98d98f28ec5725169be75602d4ed59c58ca92fb2e5dbd9505cf62ad4f03bf4f. 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/GBAYC1601512 — a six-check JSON result.
Delicate Delights: Best Loved Classical Mandolin & Lute Music
楽器は東へ西へ 琵琶とマンドリン
Bach: Harpsichord Concertos Transcribed for Mandolin
Flute Sonata in G Minor, BWV 1020 (attrib. to C.P.E. Bach, H. 542.5) (arr. for mandolin and guitar): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aac100a2af15e20a981b7b3157c5b3c0d4541dd132597f950526d69bdccfd8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN320909424 — a six-check JSON result.
Flute Sonata in G Minor, BWV 1020 (attrib. to C.P.E. Bach, H. 542.5) (arr. for mandolin and guitar): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba9a420fe8c6d64addd0ff7ff36b0c5b41f4bf517f7a87d3c607715c8d00069. 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/ITN320909425 — a six-check JSON result.
Prelude in D Minor, BWV 926 (arr. for mandolin and guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba04b458f9c4b3829894186a62f7b6c09a5bc870213850376477f4b483016bf. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ITN320909431 — a six-check JSON result.
Scarlatti, D. / Gervasio / Venier / Capponi / Valentini: Mandolin Sonatas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efaf74223eabbf895b340d583b3833496003f70927366464b1647c6926c8601. 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/ITN320905718 — a six-check JSON result.
Hummel: Sonata for Mandolin and Fortepiano / Flute Sonata / Viola Sonata / Mandolin Concerto
Giuliano: Symphony for Mandolin / Mandolin Concerto in G Major / Cecere: Mandolin Concerto in A Major / Paisiello: Mandolin Concerto in E-Flat Major
Vivaldi: Concerto for Two Mandolins in G Major, RV 532: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8c7aa01d6e346d0c85c8c6af1050eb66b73f05f0b8341a35bdfe974e3570bc. 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/FRZ208306001 — a six-check JSON result.
Vivaldi: Concerto for Two Mandolins in G Major, RV 532: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa302232eb4967d74b8b53c78061ac7705ff0da870c0017753e1c97430c71839c. 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/FRZ208306002 — a six-check JSON result.
Vivaldi: Concerto for Two Mandolins in G Major, RV 532: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffeafe07e5dd97da3f1109091b32ebab81f4ce486e8d5f3dfd2295ac278693a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208306003 — a six-check JSON result.
Vivaldi: Mandolin Concerto in C Major, RV 425: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f9e6cee8df579783a8ae1237d72ff9a163bd4e8eff7bf7b18a002732ec7aec. 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/FRZ208306101 — a six-check JSON result.
Vivaldi: Mandolin Concerto in C Major, RV 425: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0febde932a9fed675471966fd87d02aad174ee20f2ac51f3d464dfeca240c4. 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/FRZ208306102 — a six-check JSON result.
Vivaldi: Mandolin Concerto in C Major, RV 425: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f6e8297d7ea8b88921d3773a308dad1e9b9d87424ede7f7ababaf5199f520. 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/FRZ208306103 — a six-check JSON result.
Vivaldi: Concerto for Two Violins in tromba marina in C Major, RV 558: I. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175e5cc502311e3beec97461c8665e44843389cd7d1c95fe33708151919d6f71. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FRZ208306201 — a six-check JSON result.
Vivaldi: Concerto for Two Violins in tromba marina in C Major, RV 558: II. Andante molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cca0aeeaf970366115ae57225736c389c0e40d4105f874c32660c164ae871d. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FRZ208306202 — a six-check JSON result.
Vivaldi: Concerto for Two Violins in tromba marina in C Major, RV 558: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a903724cbdb3fee0a0f1ec9f195161f6554d3f63cc66562d781191efa13cc0c. 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/FRZ208306203 — a six-check JSON result.
Vivaldi: Mandolin Concerto in D Major, RV 93: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb6bc2e56e11af7546bf3f9db8c0107006179569c7df850e2b2d09fa78af41b. 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/FRZ208306301 — a six-check JSON result.
Vivaldi: Mandolin Concerto in D Major, RV 93: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324d7d7c96c43961d9cd6fd3a1a77fc8d570ee97266c0ffba89c74aa370c247c. 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/FRZ208306302 — a six-check JSON result.
Vivaldi: Mandolin Concerto in D Major, RV 93: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62faeb5c148a2356212ae12a7573914ed53f591589c18edecf221d047a1dd302. 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/FRZ208306303 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa302232eb4967d74b8b53c78061ac7705ff0da870c0017753e1c97430c71839c. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FRZ208306002 — a six-check JSON result.
Paisiello: Mandolon Concerto in C Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebb1125e6df3150c064c19e9852f40b347147c18a113363bec7bf08961c9a0d. 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/FRZ208505803 — a six-check JSON result.
Caudioso: Mandolin Concerto in G Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb04c07fd87a28d8de2f3fa5ff2e86043cc58be797080181d45df9cb3d7a1c67. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ207104601 — a six-check JSON result.
Hummel: Piano Music / Chamber Music (6 Cd Box Set)