Mieczysław Weinberg (December 8, 1919 – February 26, 1996) was a Polish, Soviet, and Russian composer and pianist. Born in Warsaw to parents who worked in the Yiddish theatre in Poland, his early year
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 0x66e283be00a12e9e19100fcab0d32fb488240e1916709ddee1f0333020458dbc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0685de6-1ade-4131-a091-ad0c5c10f7f2.json and https://artists.proofprofile.net/proofs/artist/f0685de6-1ade-4131-a091-ad0c5c10f7f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weinberg: Violin Concerto, Op. 67 & Sonata for 2 Violins, Op. 69 (Live)
Violin Concerto in G Minor, Op. 67: II. Allegretto (Live)
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 0x45c7d8fb84891e6c229dd25e11673419068ed596160ff90b5ca21f9edf44f8ec. 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/DERK62151802.
Violin Concerto in G Minor, Op. 67: I. Allegro molto (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe3f1464bbd0584dc0c669fbb223863dc6d5bfb461766e0fb323ae53ab6b682. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DERK62151801.
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
Violin Concerto in G Minor, Op. 67: IV. Allegro risoluto (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c41063a5a4c1234953627581bbb704e26cf33d3e4de338392e8f9b9a2ee23be. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DERK62151804.
Symphony No. 21, Op. 152 „Kaddish“: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87b314fa83b00dc497a8c4f9aff6d01399add425704cfa6a35e78c2ac8d818e. 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/DEN961900641.
Symphony No. 21, Op. 152 „Kaddish“: III. Largo
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Symphony No. 21, Op. 152 „Kaddish“: IV. Presto
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Symphony No. 2 for String Orchestra, Op. 30: I. Allegro moderato
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Symphony No. 2 for String Orchestra, Op. 30: II. Adagio
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Symphony No. 2 for String Orchestra, Op. 30: III. Allegretto
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Symphony No. 21, Op. 152 „Kaddish“: II. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bfa9a5aded92a6c7babb33f77dafaf658776d6351bb7cdb01337b02796aae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900642.
Symphony No. 21, Op. 152 „Kaddish“: V. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dd854b14349648dfbf0eb2171e2406bf90b4065d4566c9e55050b794f0bc8b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900645.
Symphony No. 21, Op. 152 „Kaddish“: VI. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da03a69334e81f4c924cea07c8322e79e908e08e96baaeac8044dae5b025f40. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961900646.
Weinberg: Fantasia for Cello, Flute Concertos Nos. 1 and 2 & Clarinet Concerto
Weinberg Symphony No. 2, Chamber Symphony No. 2
Weinberg: Wir gratulieren!, Op. 111 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eb804cd75b57e688ac506745c7c4272b4c0d48c5bbff1a584e042c970b2931. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN962530101.
The Passenger, Act I Scene 1: Das Ufer in der Ferne ist nicht mehr zu sehn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac08db204c8861a4b395107bd3177a518fbe64902a9eb783fff1e8e1500c57. 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/DEN962530102.
The Passenger, Act I Scene 1: Was ist los mit Ihnen, Aufseherin Franz?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fba8c706e17593c8ca4be73c019535b7ad8fb95709f4ea3a97477c1636cec9. 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/DEN962530104.
The Passenger, Act I Scene 1: Das ist alles Unsinn!
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The Passenger, Act I Scene 1: Angst hat mir nachts die Kehle zugeschnürt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5126e0be09d47f738d67be1e09f9899ce21de7f831fb6f706d680b6cb1343619. 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/DEN962530109.
The Passenger, Act I Scene 2: Wie langweilig ist’s hier, Hans!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130493398a4d2800a545a1e4b851564cae042cd7c79dba3db011b96e2cd5416c. 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/DEN962530113.
The Passenger, Act II Scene 6: Jeśliby zawezwał mnie do siebie Bóg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae4a2dba07d9164a181cbdd39baef398c306c3c4ce97ec0029ce261fea78ba. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:50:25Z), 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/DEN962530133.
The Passenger, Act I Scene 1: Drei Jahre sind im Nu vorbei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6886e3f4c9949256e980ffc14a993c4e340f3413e218bef8b76f808489e03c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530103.
The Passenger, Act I Scene 1: Marta? Kann das Marta sein?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710fa859ca044f7b38bf2c781b6f0ad90509d9ae1ff4d06708a455eaa687bb79. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530105.
The Passenger, Act I Scene 1: Negro paredón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42518f8752ce88f29ea7488dbc66d79d975354603f37d9108c1721085615945. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530106.
The Passenger, Act I Scene 1: Sei still, sei still
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547628453163006114341ec1bbf0dac74b83ecf13fb7b89b06d45fd4bbfecb04. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530108.
The Passenger, Act I Scene 1: Für ein schweres Vergehen, da kam sie in den "Todesblock"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ca0fd75e622589cd476b98e71419009cae7bada450bec9cf5ec3f76880d633. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530110.
The Passenger, Act I Scene 1: Fort, Gespenster der Vergangenheit!
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The Passenger, Act I Scene 2: Ty ukryt ot nyeba reshyotkoy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe99812206dd015f91440ceae199accdb5dd047e9557a4e5e8f8a7e8fe43812. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530114.
The Passenger, Act I Scene 3: Další den minul, uplynul
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The Passenger, Act II Scene 7: Your Good Health, Sir
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Bonds: Songs of the Seasons: No. 2, Winter Moon
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Satie: 3 Petites pièces montées: No. 1, De l'enfance de Pantagruel. Rêverie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12345bbd764f4cdf0dd93bd19f6a4f86be7e1175889584888287502bd390689. 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/GBAYC2301258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bfade4f31189e27a6243160ec4e7d5dd361e3c67dd4a9a3a2fdf2bff70626a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPFW2400013.
Mendelssohn, Fanny: 6 Lieder, Op. 7: No. 2, Erwin
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Traditional: Danny Boy (Bill Evans Version)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99b6619cd7b9fd82e25cfdc3066939f4344cb95f0268849b570ad3e3851f24c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC2301093.
Mozart: Komm, liebe Zither, komm, K. 351
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf3fae01e3b4da09f2ca5870f390f657ce226a65dfd178667d59818192d3267. 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/GBAYC2202384.
Mendelssohn-Hensel: 6 Lieder, Op. 9: No. 6, Die Mainacht (Version for Flute and Piano)
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Strauss, R: 5 Lieder, Op. 48: No. 2, In Schwebe
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13183adb8f548871d60a823e19e446a78a69516576d752050555a5e816401ea4. 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/GBAYC2302330.
Barrios Mangoré: La catedral: I. Preludio saudade
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Godowsky: Triakontameron, Vol. 3: No. 11, Alt Wien
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Handel: Semele, HWV 58, Act 2: "Prepare, Then, Ye Immortal Choir" (Semele, Ino)
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Prokofiev: Suite No. 2 from Romeo and Juliet, Op. 64ter: VI. Dance of the Girls With Lillies
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Saint-Saëns: Mélodies persanes, Op. 26: No. 1, La brise
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Handel: Messiah, HWV 56, Pt. 1: Pifa. Larghetto e mezzo piano
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Couperin, F: Second livre de pièces de clavecin, Sixième ordre: V. Les barricades mystérieuses
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Handel: Messiah, HWV 56, Pt. 1: Accompagnato. "Comfort Ye, My People"
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Handel: Esther, HWV 50b, Act 2: "Who Calls My Parting Soul from Death?" (Esther, Ahasuerus)
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Lehár: Friederike: "Warum hast du mich wachgeküsst?" (Friederike)
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Once Upon a Dream (From "Sleeping Beauty")
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Ravel: Shéhérazade, M. 41: No. 2, La flûte enchantée
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Bernstein: West Side Story: Somewhere (Arr. Penaforte for Violin and Piano)
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Satie: 3 Gymnopédies: No. 1, Lent et douloureux
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Schumann: 3 Romances for Violin and Piano, Op. 22: No. 1, Andante molto
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Ravel: Sonatine, M. 40: II. Mouvement de menuet
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Legrand: The Windmills of Your Mind (From "The Thomas Crown Affair")
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Liszt: 12 Lieder von Schubert, S. 558: No. 9, Ständchen (After Schubert’s D. 889)
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Lysenko: Rhapsody on Ukrainian Themes No. 2, Op. 18: I. Dumka (Version for Piano Solo)
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Debussy: Petite suite, CD 71, L. 65: I. En bateau
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Strauss, R: 5 Lieder, Op. 48: No. 4, Winterweihe
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Caccini: Le nuove musiche: No. 8, Amarilli, mia bella
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Strauss II, J: Das Spitzentuch der Königin: "Wo die wilde Rose erblüht" (Königin, König, Irene)
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Songs of Fate: Weinberg, Kuprevičius, Šerkšnytė, Jančevskis
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Cello Concerto in C Minor, Op. 43: I. Adagio
Shostakovich & Weinberg: Cello Concertos
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Cello Concerto in C Minor, Op. 43: III. Allegro - Cadenza
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Jewish Songs, Op. 13: No. 5, Oyfn grinem bergele
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Jewish Songs, Op. 13: No. 6, Der yesoymes brivele
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Cello Concerto in C Minor, Op. 43: II. Moderato - Lento
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