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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71093ec6591936f07933b9b69f280a312b49e486f4ee1bef8f3a548d291351f1. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa1c7509-0aba-41bf-9453-d23dc6b2fb4b.json and https://artists.proofprofile.net/proofs/artist/fa1c7509-0aba-41bf-9453-d23dc6b2fb4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Requiem in D Minor, K. 626: I. Introitus, Requiem aeternam
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e316192c8d8773518be655d7d6eae53f1d1dd1055bcec56e23d2d2c6469a8f4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8900801.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": II. Romanze (Andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb492139493bf1d6268d4b6b01e3179f381e1fbd8fc855a4b1cc66fac7e0f4767. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYC9003017.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce5086cea50b652256e50b4668ee0dc9d9d9b28c03c584fb3878fbcadd8888. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYC9003016.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": III. Menuetto (Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10309507f92b92babe3fa00425777fd1c09d539b6729c6dafd1b8bf979635f28. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9003018.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": IV. Rondo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adfcabc20d5fbd593d54479412ab11c6ddcc1396f91e546e35c8dc371da54a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC9003019.
Don Giovanni, K. 527, Act I: Sinfonia (Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3018003825faf3dde0bdd1043af4df7db618b87a7298a56f2c01b6b76bfecbbe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9004362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c2ac7f89d52533fab6acbec0852ad2905af657e75eb6c1edc8c524867c7955. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA800115814.
Symphony No. 20 in D Major, K. 133: III. Menuetto & Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3569e5c91d9ceb947fdb7280c6b4496bcbdf2bd1d3628b1924f27ddbffe4f5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9303027.
Serenade No. 11 in E-Flat Major, K. 375: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51173e5706bbb3462bc08bd11291df5a4ef32d49026c6ba9d1700ee6cc5a197a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYC0501667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb492139493bf1d6268d4b6b01e3179f381e1fbd8fc855a4b1cc66fac7e0f4767. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9003017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce5086cea50b652256e50b4668ee0dc9d9d9b28c03c584fb3878fbcadd8888. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9003016.
András Schiff - Concertos & Chamber Music
Beethoven: Piano Concerto No. 1 in C Major, Op. 15: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074231086a050f3ad7c92466b36b365cf54527be4d95119f946365205bde8b8e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA809642201.
Bartók: Violin Sonata No. 1; Sonata for 2 Pianos & Percussion; 10 Duos
Violin Sonata No. 2 in D Minor, Op. 121: I. Ziemlich langsam - Lebhaft
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Violin Sonata No. 2 in D Minor, Op. 121: II. Sehr lebhaft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be48b933fb4359fb5a80822708cedc4520dfe71c9cc2cebb242219a5d8b5a5b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB331981505.
Violin Sonata No. 2 in D Minor, Op. 121: III. Leise, einfach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d84b9fd5f0d603ce58bf80c5ded879af76a3b8ec345825470fd6e479d76ec5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331981506.
Violin Sonata No. 2 in D Minor, Op. 121: IV. Bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47216ca6b439ec84a64693efa00c3ab325b4ae055d8a98ea7eb09057df228a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331981507.
Violin Sonata No. 1 in G Major, Op. 78: I. Vivace ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d072cb70da2bf2e385d498b09aeadfe8321950e88a03e3655058d1777783e19. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:19Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331981501.
Bach - Busoni - Beethoven: Violin Sonatas
Violin Sonata No. 3 in E Major, BWV 1016: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f9a441cc427bfc82865d370c0df04b98eb79be7e5e3630e22f5e9bad0d33a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:39:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331551001.
Violin Sonata No. 3 in E Major, BWV 1016: III. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90d6f27cd2ddc5b3a059e6914e8cbaa6ec35cd302a3b11eb68fae9b290a9f5e. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331551003.
Violin Sonata No. 3 in E Major, BWV 1016: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aec2bebde8235109a3e51e4313ccbc4952dbf0b7245a36f7918665ee42dc391. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331551004.
Violin Sonata No. 2 in E Minor, BV 244: II. Presto –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4619cf309258e3edabbc04a76577db88dc1f26b1ee196237bfaf880a13451b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331551006.
Violin Sonata No. 2 in E Minor, BV 244: IIIa. Andante, più tosto grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693a8cf6408e2836cf4914879ea58a7699342fe9efc109d5a1007e033586e1bd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331551007.
Violin Sonata No. 10 in G Major, Op. 96: II. Adagio espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5890c71f490a656d7f65e06c7906c2f3ae642f0b03868738185f64aaded8a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331551010.
Dvořák: Violin Concerto in A Minor, Op. 53 & Symphony No. 7 in D Minor, Op. 70
Mozart: Violin Sonatas Nos. 21, 27 & 32; Six Variations on "Hélas, j'ai perdu mon amant"
Schumann: Violin Sonata No. 2 in D Minor, Op. 121: II. Sehr lebhaft
Brahms: Violin Sonata No. 1 in G Major, Op. 78: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1116d78c2fa84b32f103f42659d52a9226503acd0b2216e8c23c7825d321f06. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF079111161.
Keyboard Concerto in D Minor, BWV 1052: I. Allegro - Performed on Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71c52ae766e78c74465d4f9a40291649fbbcac8e3a5dd5169eb5e8b54b7281. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078941201.
Keyboard Concerto in D Minor, BWV 1052: II. Adagio - Performed on Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa529981babc9979dfbb28085dd576bfb45f9270017e2222024c05807fd792d22. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078941202.
Keyboard Concerto in A Major, BWV 1055: II. Larghetto - Performed on Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03265737861125527ed7dbeaf37f4f9559e0ae0aaa6a1ea51579a01ad37aad9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078941211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb862dbc4a048c5d6625b99914a7c77029673ca1566d5e4d73d35354a776ec5de. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079111163.
Concerto for Flute, Violin, Harpsichord, and Strings in A minor, BWV 1044: 3. Tempo di Allabreve
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Concerto for 3 Harpsichords, Strings, and Continuo No. 1 in D minor, BWV 1063: 1. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed0aee036a1a52c522c68484fede7a15df9d69455c6aaf374279cc351513929. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079311941.
Keyboard Concerto in F Minor, BWV 1056: I. [Allegro] - Performed on Piano
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Concerto for 2 Harpsichords in C Minor, BWV 1060: II. Adagio - Performed on 2 Pianos
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Concerto for 3 Harpsichords, Strings, and Continuo No. 1 in D minor, BWV 1063: 2. Alla siciliana
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Concerto for 3 Harpsichords, Strings, and Continuo No. 1 in D minor, BWV 1063: 3. Allegro
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Keyboard Concerto in F Minor, BWV 1056: III. Presto - Performed on Piano
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Concerto for 3 Harpsichords, Strings, and Continuo No. 2 in C, BWV 1064: 1. (Allegro)
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Concerto for Keyboard, Strings, and Basso continuo No. 3 in D, BWV 1054: 1. --
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Concerto for 2 Harpsichords, Strings, and Continuo in C, BWV 1061: 2. Adagio
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Concerto for 3 Harpsichords, Strings, and Continuo No. 2 in C, BWV 1064: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9569a76bdb5a001346f84d380d6d45b829e58e7e869359959481c2116de7df. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079311952.
Concerto for Keyboard, Strings, and Basso continuo No. 3 in D, BWV 1054: 2. Adagio e piano sempre
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Concerto for Harpsichord, 2 Recorders, Strings, and Continuo No. 6 in F, BWV 1057: 2. Andante
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Concerto for Keyboard, Strings, and Basso continuo No. 3 in D, BWV 1054: 3. Allegro
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Concerto for Harpsichord, 2 Recorders, Strings, and Continuo No. 6 in F, BWV 1057: 3. Allegro assai
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Concerto for Harpsichord, Strings, and Continuo No. 7 in G minor, BWV 1058: 1. --
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Concerto for Harpsichord, Strings, and Continuo No. 7 in G minor, BWV 1058: 2. Andante
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'December' - A Season of Classics: Mozart
Andante And Five Variations For Piano Duet In G, K.501: Variation 4
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Andante And Five Variations For Piano Duet In G, K.501: Variation 5
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Symphony No. 41 In C, K.551 -: 4. Molto allegro
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Janácek: Concertino; On An Overgrown Path; Violin Sonata
On an Overgrown Path (Po zarostlém chodnicku), JW 8/17 / Book 1: 1. Nase vecery (Our Evenings)
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On an Overgrown Path (Po zarostlém chodnicku), JW 8/17 / Book 1: 7. Dobrou noc! (Good Night!)
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Piano Trio in C Major, K. 548: II. Andante cantabile
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Mozart: Clarinet Trio, K. 498 "Kegelstatt", Piano Trios, K. 502 & K. 542
Mozart: Piano Trio No. 3 in B-Flat Major, Op. 15 No. 1, K. 502: II. Larghetto
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Mozart: Piano Trio No. 3 in B-Flat Major, Op. 15 No. 1, K. 502: III. Allegretto
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Schulhoff: String Quartets Nos. 1 & 2; 5 Pieces; Divertissement; Concertino (Lockenhaus Collection Vol. 7)