Sir András Schiff (; born 21 December 1953) is a Hungarian and British classical pianist and conductor. He has received numerous awards and honours, including the Grammy Award, Gramophone Award, Mozar
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 0x6e8a04eddeec49de1ba0d074b8cbec7b71758f9bf1e6f9ccf00855c5f74ef8fc. 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/720cbd7f-fcc4-47b8-a498-31251a973e04.json and https://artists.proofprofile.net/proofs/artist/720cbd7f-fcc4-47b8-a498-31251a973e04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Sonata No. 1 in C, K.279: 1. 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 0x67c057fa13641972ebb58149f8950ef185b124c8ceb51666360885bf134f5e62. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010321.
Piano Sonata No. 11 in A Major, K. 331: 1. Tema (Andante grazioso) con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408e6c2d67298ce7ddc7b1f989017b1128fb7d19ab1253b97d43280332c5dec1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010221.
Piano Sonata No. 13 in B flat, K.333: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d11c879df0abdcd80d695c80c4c9a9723ec93dbfb25862fc8c7ae296da9c8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010071.
Piano Sonata No. 15 in F, K.533/494: 1. Allegro, K.533
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab91b00eeb168b9260f6f7ce3ea0c039c720519a5ba8938d57c4533a8f3893d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010181.
Piano Sonata No. 6 in D, K.284 "Dürnitz": 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97093d6c7ca349f11db564bd9118ec18e153da9829b7ded333bc47f48398f761. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010281.
Piano Sonata No. 1 in C, K.279: 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6856053623b78e44c4446d3bd7d97da71d40c6b190e59b4316c4bff6cdf6718. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010322.
Piano Sonata No. 13 in B flat, K.333: 2. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd719147d2ac72636c88915370409d07d05cfc2fbe5cb5c548b8ac8c37ef4eac1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010072.
Piano Sonata No. 11 in A Major, K. 331: 2. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a39ff09f29bc5d3a5604b3e3b0912fa6c98ccfccb0040593e2c4ac7590da12c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010222.
Piano Sonata No. 15 in F, K.533/494: 2. Andante, K.533
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35de16a28dc9035a78ad748593e05c96847fe58e360ea91cd44e34d6c5e86e5d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010182.
Piano Sonata No. 6 in D, K.284 "Dürnitz": 2. Rondeau en Polonaise (Andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4935133a8172898ca6a548965bcbe2feddc76429c6e9b6fc739fd8e212fafeec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF078010282.
Piano Sonata No. 1 in C, K.279: 3. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9379947c84be573933865fc07f4eae08c98ac047c3fa3eb7bb51fb190791b2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010323.
Piano Sonata No. 13 in B flat, K.333: 3. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d83a25897f331823163531bd68b4386a422bf7ad0118edb8de53eac9e0148b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010073.
Piano Sonata No. 11 in A Major, K. 331: 3. Alla Turca. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e98aaa7165ec02cb9c77245d396609d3f705c99c1f42049e23da7b821d2505. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010223.
Piano Sonata No. 15 in F, K.533/494: 3. Rondo (Allegretto), K.494
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6571352360ac5f4841dd90bee4f06af2b56b9248c74e53c4dda88b56166169c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010183.
Piano Sonata No. 6 in D, K.284 "Dürnitz": 3. Tema con variazione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3b01371c0c73d639d703757436be6a9651ccc75eaf4f7ba309dae3fa4affdd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF078010283.
Piano Sonata No. 4 in E flat, K.282: 1. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec152fa6d3fc785099a06639e6532769e58340c8cb288dfee031fa8d0860cc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010331.
Piano Sonata No. 16 in C, K.545 "Sonata facile": 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf093d4f888dfca49d0c5c8c3ea2190efdcef45fddea4e761133e220bd9c5b138. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010081.
Piano Sonata No. 8 in A minor, K.310: 1. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f8d45e2d07cb3ff94d15a83333fd0a0fb044314f92f3142543fb497479b2ed. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010231.
Piano Sonata No. 3 in B flat, K.281: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1d3f0b1f5c0b9f2182411fee5975bdafb88823da5add995bd9c40a0a3ee442. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010191.
Piano Sonata No. 5 in G, K.283: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d40a9c7305d0be7fea698bae9988f7f81b70d9b7527b1bb4f9aefc672c949. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010291.
Piano Sonata No. 4 in E flat, K.282: 2. Menuetto I-II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb4e99165133b55cd77e10ff0c1c9c8b6b592c599e906dfa4e5858df35112fe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010332.
Piano Sonata No. 16 in C, K.545 "Sonata facile": 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eaab1c914c63279fcc7a6b8ee3b79628db84d927e11c49d3b2b0a2b9fa5f92. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010082.
Piano Sonata No. 8 in A minor, K.310: 2. Andante cantabile con espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7601fae4f1c410fa22fea5fd740ca8ec93111ac7acaa8ad779466ed276b39812. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010232.
Piano Sonata No. 3 in B flat, K.281: 2. Andante amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494e9b844854ea91f83c1a71bee223106aef51ddc7d50dfcf3b1e0e17d541ff7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010192.
Piano Sonata No. 5 in G, K.283: 2. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1096c401937707b4d7ed22c6b2017db46a76be3cf9b8decdc65b5d6b09c858ce. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010292.
Piano Sonata No. 16 in C, K.545 "Sonata facile": 3. Rondo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108dd918af7abf20430e9ae9964864e21579af7b3b760c6189a6e33e96e0825a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010083.
Piano Sonata No. 8 in A minor, K.310: 3. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbf79269f835af0c4129ecc6f66ee41d8059dcce40d5bd53e4506cbe5eab3e0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010233.
Piano Sonata No. 3 in B flat, K.281: 3. Rondeau (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08581b25139426573a9c1c9b81c943ec2a0937009fd44cd1c4208523797f075. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010193.
Piano Sonata No. 5 in G, K.283: 3. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc202716e5c6b7b91fb8e3c7fb0790493997f80835a8e909937a3c31b8bbfff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b83fdfcb0b79cb07823ee470b231feb39464e0595342534bf9d8e05e38031. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010091.
Piano Sonata No. 18 in D, K.576: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d515d66ab1ce89a3eb4573b65b40994cfbd46665a5b80509faea7fdbb18c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010241.
Piano Sonata No. 9 in D, K.311: 1. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c385c11039e19e285429c2520b0f0a28f7e80b58f33ca5fbb170e7e6db97d2e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010201.
Piano Sonata No. 10 In C Major, K.330: 1. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd9168336d50b5d9d050c6e6697b782a710fcd1102296cd3f0eb1dd8a59c059. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03207f25474f5cc07dff20d748cdd2252e727d5ea61291a95b2abbd4ea6ab2bc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010092.
Piano Sonata No. 18 in D, K.576: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc673e8cf80612136cd3004264cbe418f6d4ba4eadc929d6243dfa0ef83f5e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010242.
Piano Sonata No. 9 in D, K.311: 2. Andantino con espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1e211c56faf420c77de3076fe3d6919c27011d6413d8a98f2bdcc39c706297. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010202.
Piano Sonata No. 10 In C Major, K.330: 2. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc443c4b4f456809898616dc22d8316b551e0271c36c519bfcec2af86f8e4ee7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6824d7ea90fa0ab8a46a46c058c355a68959b8e5a08b256502b3cebe67a48f5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010093.
Piano Sonata No. 18 in D, K.576: 3. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeb1290ad472f02b3c0de12681588a18e395286f064f6d416609c35233ad0ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF078010243.
Piano Sonata No. 9 in D, K.311: 3. Rondeau (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0355d959626e1235cb3658afab9c91a5186a9496a9c19e7ecf6328e39a02f77f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010203.
Piano Sonata No. 10 In C Major, K.330: 3. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad886465926f5b4f064806ebb9b875bcf5be1e3a6b6c08666d6f9c016a28530c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF078010303.
Piano Sonata No. 2 in F, K.280: 1. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb952f1d666b3a0ce74986a4768a18e74a5fe79808cf6bb99579ee314408bef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBF078010311.
Piano Sonata No. 14 in C minor, K.457: 1. Molto allegro
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Piano Sonata No. 7 in C, K.309: 1. Allegro con spirito
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Piano Sonata No. 2 in F, K.280: 2. Adagio
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Piano Sonata No. 14 in C minor, K.457: 2. Adagio
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Piano Sonata No. 7 in C, K.309: 2. Andante, un poco adagio
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Piano Sonata No. 2 in F, K.280: 3. Presto
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Piano Sonata No. 14 in C minor, K.457: 3. Allegro assai
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Piano Sonata No. 7 in C, K.309: 3. Rondeau (Allegretto grazioso)
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Smetana: 3 Salon Polkas, Op. 7: No. 1 in F-Sharp Major
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Smetana: 3 Salon Polkas, Op. 7: No. 2 in F Minor
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Smetana: 3 Salon Polkas, Op. 7: No. 3 in E Major
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Smetana: 3 Poetic Polkas, Op. 8: No. 1 in E-Flat Major
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Smetana: 3 Poetic Polkas, Op. 8: No. 2 in G Minor
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Smetana: 3 Poetic Polkas, Op. 8: No. 3 in A-Flat Major
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Smetana: Memories of Bohemia in the Form of Polkas, Op. 12: No. 1 in A Minor
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Bartók: Violin Sonata No. 1; Sonata for 2 Pianos & Percussion; 10 Duos
Bach: Keyboard Concertos, Bwv 1052, Bwv 1053, Bwv 1060 and Bwv 1061
Piano Concerto No. 1 in D Minor, BWV 1052: I. Allegro
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