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 0x5de78ef7c023df3ead0710bbf9dc2d38265e921e7001fa59d5a6ca1190e63f5f. 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/3a941d9b-168d-4b71-8347-9f8b1aee358e.json and https://artists.proofprofile.net/proofs/artist/3a941d9b-168d-4b71-8347-9f8b1aee358e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Brahms, Ligeti, Mozart, Schumann: Horn Trios
Mozart: Violin Sonatas KV. 301, KV. 303, KV. 305, KV. 454
Sonata for Violin and Piano in B Minor: 1. Moderato
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 0xeb3a5c80bee719f95a988fe1e5d45184d8d821532d345fee2ac49eef2ef62c15. 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/ITUM71800819 — a six-check JSON result.
Sonata for Violin and Piano in B Minor: 2. Andante espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c0bcf719509ec2a2c64e64b678789bff8cea852466a118bef17a7815dc024. 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/ITUM71800820 — a six-check JSON result.
Suite Italienne from "Pulcinella" - Arr. by Stravinsky & Dushkin: 1. Introduzione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960fb5430dbacaa3191de4ac9da90596ed37f3fe581399b53085e3d5485b255. 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/ITUM71800823 — a six-check JSON result.
Suite Italienne from "Pulcinella" - Arr. by Stravinsky & Dushkin: 2. Serenata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ae139371b04d34e51307734e6fc82b608038a7e8f5ab74cab8f7e4e87c693. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITUM71800824 — a six-check JSON result.
Suite Italienne from "Pulcinella" - Arr. by Stravinsky & Dushkin: 3. Tarantella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0688ccc6841552821234bd23c94ac4fe83c93f05d3dc380a295a4415fd192e. 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/ITUM71800825 — a six-check JSON result.
'Violetta', Fantasia for Violin and Piano from 'La Traviata'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c49f4ebf20c88bdc17e76d43d99a3ebfaa5e27e622a87327882a68da41bd30. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITUM71800831 — a six-check JSON result.
Violin Concerto No. 1 In D Major, Op. 6, MS.21: 3. Rondo. Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870c5353a251117d4493b95d977ea356f503e83b86cacfc8ff23a7541a3ee8f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITUM71701059 — a six-check JSON result.
Violin Concerto in D Major: 2. Romanza - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8503d8d5d613fcc4167d2a5270675c2ea4e6b0b2c6411a9d95075e2950541062. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITUM71701060 — a six-check JSON result.
Beethoven: Violin Sonatas Nos. 1, 2, 5 "Spring" And 8
Beethoven: Violin Sonatas Op. 12, Op. 23, Op. 47
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ee59775526b1ed6e5ad7e06507e4e0ae633622db30eeec602c709b86d0e02a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITUM71200680 — a six-check JSON result.
Schumann: Duet from "Phantasiestücke", Op. 88
Busoni: Concerto in D Major, Op. 35a: II. Quasi andante
Brahms: Concerto in D Major, Op. 77: III. Allegro giocoso
Mozart: Piano Quartet No. 2 in E Flat Major, K. 493: III. Allegretto
Mozart: Piano Quartet No. 1 in G Minor, K. 478: III. Rondo
Mozart: Concerto No. 2 in D Major, K. 211: III. Rondeau. Allegro
Mozart: Concerto No. 1 in B-Flat Major, K.207: III. Presto
Mozart: Sonata, Op. 1 No. 5, KV. 305: I. Allegro di molto
Mozart: Sonata, Op. 7 No. 3, KV. 454: III. Allegretto
'Figaro', Fantasia for Violin and Piano From 'Il Barbiere di Siviglia'
Nicola Campogrande: Danze della signorina Olivia
Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5ebda2bf3325f355074e7c786e2b1e21d108fd28c06e60b956d0f099703f8d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBLWD2203701 — a six-check JSON result.
Violin Concerto No. 1 in B-Flat Major, K. 207: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837522fc74a6f30a088a53e778de4bd41ff0ff7b2ca53ec389bb3e3cbeca054a. 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/GBLWD2203702 — a six-check JSON result.
Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46afb592b1f18c841bfff0d500a9fc807d74ae5d4f18b27e11ace876a0ba3a63. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLWD2203703 — a six-check JSON result.
Violin Concerto No. 2 in D Major, K. 211: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378e6788f69edf4f447029d62643f18d2852580aafca7040df0d18b753ef27ac. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBLWD2203704 — a six-check JSON result.
Violin Concerto No. 2 in D Major, K. 211: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d883f2e1193de5649281d19245e0f75483c3c772038bc2f09f5d0e66a0d8d6c. 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/GBLWD2203705 — a six-check JSON result.
Violin Concerto No. 2 in D Major, K. 211: III. Rondeau. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6ec4257e8c3e38b79ec00ff2d7db41a997f667b22f8b75b5baf0d148b3beb3. Chain 2 (Bitcoin): anchored in block 956960 (2026-07-06T23:19:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2203706 — a six-check JSON result.
Violin Concerto No. 5 in A Major, K. 219 "Turkish": I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee2d5f1612f3a27479f4264e6d73c60dbfa89ee1e08e47868cbde3e9594ed93. 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/GBLWD2203707 — a six-check JSON result.
Violin Concerto No. 5 in A Major, K. 219 "Turkish": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a35d61ece197ba345f720d10e447a47b50e779d310f8d119d23bf48f2cd51c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2203708 — a six-check JSON result.
Violin Concerto No. 5 in A Major, K. 219 "Turkish": III. Rondeau. Tempo di Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ad0bce92af8ae02e52a8d416f13bc48503b0246cc9995dd27fe8392575b523. 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/GBLWD2203709 — a six-check JSON result.
Grandes Clásicos De Violín - La Mejor Música Clásica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c49f4ebf20c88bdc17e76d43d99a3ebfaa5e27e622a87327882a68da41bd30. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITUM71800831 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe05e2e1217bf7893de86acddb484d7a64650011ca3d9769c9b3fe35ce701f95. 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/GBBBC2100079 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dab42a065766bb92565a5c4e41e26d42301dee0a1397a6cbf3c232a984b4f38. 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/DEN961900530 — a six-check JSON result.
La Campanella, Op. 7 - Arr. August Wilhelmj: arr. August Wilhelmj
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1551cb646b3ee2d62a6dbcc36c230b6595e5d2d6aac15d913898eda44f315d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEF059505660 — a six-check JSON result.
String Quartet No. 11 In F Minor, Op. 95 - "Serioso": 1. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9c013cc602647d427c43c788c36484c67c571e39674015d1dcb0416860a09f. 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/DEF059606181 — a six-check JSON result.
String Quartet No. 11 In F Minor, Op. 95 - "Serioso": 2. Allegretto ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f975b4f8ae003b1bfccadf558132421db66d60fea31753ae658276c87d2ab7c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059606182 — a six-check JSON result.
String Quartet No. 11 In F Minor, Op. 95 - "Serioso": 4. Larghetto espressivo - Allegretto agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c6453baa807e5f58c32febff122e914fec04e978008d5cbcc1d6752e7fc7a5. 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/DEF059606184 — a six-check JSON result.
String Quartet No. 1 in F, Op. 18 No. 1: 2. Adagio affettuoso ed appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a5c54af333e0054c5f932f512efcea3f695118ffe601d60aa37ca99a2e3346. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEN960300142 — a six-check JSON result.
String Quartet In C Sharp Minor, Op. 131: 6. Adagio quasi un poco andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8f9d7b2d5875aa15b5d1d749df3117e1f5cd18cef13982893862735b5c1c04. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058100996 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c7ff9a68909d377adb7bf8f5532373eb4ec9578532924eb8daefba381dd98a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLA507000727 — a six-check JSON result.
Busoni: Violin Sonatas Nos. 1 & 2 & 4 Bagatelles
Violin Sonata No. 1 in E Minor, Op. 29, BV 234: I. Allegro deciso - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508c38bae2fcd6b2a6214b3a23f799bd5a60cf52b4c7c4859580c56048133fd6. 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/GBLWD2406601 — a six-check JSON result.
Violin Sonata No. 2 in E Minor, Op. 36a, BV 244: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07a9b4b32928d60707299a1d08f4d70adef4c434eedf265a7afec4d8422b17e. 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/GBLWD2406605 — a six-check JSON result.
4 Bagatelles, Op. 28, BV 229: No. 3, Wiener Tanzweise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aa20c5c160f5a101b6272b341bb7e203e073603fd86218ac7d98ac6651df6c. 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/GBLWD2406616 — a six-check JSON result.
Concerto in D Major, Op. 35a: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fed503e83092ee436a718eeba63c269d2c5c765e58a8b040895e9dfbbff969d. 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/GBLWD2401501 — a six-check JSON result.
Concerto in D Major, Op. 35a: II. Quasi andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83ac71248de406db5b219bb16de961f51d71383305d6e33bd2c217b5ff55e6. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2401502 — a six-check JSON result.
Concerto in D Major, Op. 35a: III. Allegro impetuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f6c876679678dce4cb0da4d56c33fa0aaafd9bcf809df39bc24194c2158bc4. 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/GBLWD2401503 — a six-check JSON result.
Concerto in D Major, Op. 77: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ce9229577531099a1626fddb8c403aad42620ab7066628b85dbee8a57bc972. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBLWD2401504 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44dcbee02f935b20dcf41c832a28cdf89649f5aaa210d55c377b0c21cb7b708. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLWD2401505 — a six-check JSON result.
Concerto in D Major, Op. 77: III. Allegro giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714bf0d89bdce1a725e35204ca7349ee8460ea3b85170eccbaeaeb0350b14a8. 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/GBLWD2401506 — a six-check JSON result.
Piano Quartet No. 1 in G Minor, K. 478: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097014a399ec7c4677e972dda903f063c2fe975df580eea3424abca2429b603. 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/GBLWD2304801 — a six-check JSON result.
Piano Quartet No. 1 in G Minor, K. 478: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306129ee996e297a112f94c1046eb19bfa792bd61af1ed0e3dc32c609313406f. 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/GBLWD2304802 — a six-check JSON result.
Piano Quartet No. 1 in G Minor, K. 478: III. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed916734f21ecda7d4a102ea89ce5a2c146828849803fdfa821315c41cfc2d4. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBLWD2304803 — a six-check JSON result.
Piano Quartet No. 2 in E-Flat Major, K. 493: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8751abc9953f97bd4112bf065199e53a93d9d1e0243f35764b282422051952a8. 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/GBLWD2304804 — a six-check JSON result.
Piano Quartet No. 2 in E-Flat Major, K. 493: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178f3a6c80a2dda72c0672190e7f33fb208f9ff5ae843a75d6fa18b02c7352b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLWD2304805 — a six-check JSON result.
Piano Quartet No. 2 in E-Flat Major, K. 493: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef6426e958cc461c53d2f6b13df8a77da01723a67afd34058eff85640dcce28. 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/GBLWD2304806 — a six-check JSON result.
Violin Sonata in B-Flat Major, Op. 7 No. 3, K. 454: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eee580b96215d6d2e3ad252f069a4d1a50e9dc7cac32b258670c624e880422d. 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/GBLWD2201401 — a six-check JSON result.
Violin Sonata in B-Flat Major, Op. 7 No. 3, K. 454: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2584a95fb24d14e5c2b79c856890f216647b29c431ab808728315224332116b2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBLWD2201403 — a six-check JSON result.
Violin Sonata in G Major, Op. 1 No. 1, K. 301: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad2f53b8e757edf17c65ad8f0fa0fd47c6a43ff05c792ac6346e7e82faee08a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBLWD2201404 — a six-check JSON result.
Violin Sonata in G Major, Op. 1 No. 1, K. 301: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cac944ba7d277b5302ad74a1a1a9508b49295e25b6576646c78b5341ab9b6a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBLWD2201405 — a six-check JSON result.
Violin Sonata in A Major, Op. 1 No. 5, K. 305: I. Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09105f1cbb8429a8a147a6d5606ed657234da2cafea444e5d169a47dbaa9e46. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLWD2201408 — a six-check JSON result.
Violin Concerto No. 3 in G Major, K. 216: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6544e487b18f61dd9e5518477692d4d87737c4349216e0de53b53debe775bed. 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/GBLWD2103301 — a six-check JSON result.
Violin Concerto No. 3 in G Major, K. 216: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0117e3e8712353fa0ffc9a6776f147fc3d0ba3fd190bf0ec01aefaf472f2487. 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/GBLWD2103302 — a six-check JSON result.
Violin Concerto No. 3 in G Major, K. 216: III. Rondeau. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fe5f152067421d305377e314d45c4757a29bfe2f0fe52b62aca38fa5a12725. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLWD2103303 — a six-check JSON result.
Violin Concerto No. 4 in D Major, K. 218: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec8ec6441a88206b331a1eb580e369d5d4a71bf823c7ef0e6b0a711d93edb23. 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/GBLWD2103304 — a six-check JSON result.
Violin Concerto No. 4 in D Major, K. 218: II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654b48c218e3161aeeb906f206fe2ea5e0efd1f736bb6745959ac938fc800734. 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/GBLWD2103305 — a six-check JSON result.
Violin Concerto No. 4 in D Major, K. 218: III. Rondeau. Andante grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd55e95daee74bd4e3086c41d161e38c612a9447a065ef4655025b64381dcdc. 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/GBLWD2103306 — a six-check JSON result.
Violin Sonata in E Minor, Op. 1 No. 4, K. 304: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b08097163defc90169f0336e5e8772004dbc4cac09ebce93997bf7b305c24. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2103307 — a six-check JSON result.
Violin Sonata in E Minor, Op. 1 No. 4, K. 304: II. Tempo di Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4c524f342d512ad310ff361ad537449d3ec2b0e7c803f8753569eb3a1dd57d. 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/GBLWD2103308 — a six-check JSON result.
Violin Concerto No. 2 in B Minor, Op. 7, "La Campanella": Finale. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264f1c954ac9920913c00bf9eb63016f8bdcb917cb9a364ab3e392bc74165e60. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2101401 — a six-check JSON result.
Cantabile for Violin and Piano in D Major, Op. 17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d16b3c876070a4e24007b2f9baacc90bfabd80c5f95fb70dfaf9a0561330f. 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/GBLWD2101406 — a six-check JSON result.
Busoni: 4 Bagatelles, Op. 28: III. Wiener Tanzweise
Busoni: Violin Sonata No.2 in E Minor, Op. 36a: II. Presto