Hans Graf (born 15 February 1949 in Marchtrenk) is an Austrian conductor. Biography As a child, Graf learned the violin and the piano. He studied at the Musikhochschule in Graz, Austria, and graduate
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 0x645b643b20001e6b710a33bacf1a3f9a3d3e082dcf808c8c23be58b746f20805. 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/b64c93fc-b7f8-465a-aa91-c76b04bff66f.json and https://artists.proofprofile.net/proofs/artist/b64c93fc-b7f8-465a-aa91-c76b04bff66f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Spiegel im Spiegel (Version for Violin & Piano)
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 0x81ee3c49d06b77802b8f515b7479b53c9a6403c876b6d4d85f2499ffe33e90da. 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/USB8U1611850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6073f9b7d32fc0d3215005d828caaf39382a4438e0c18faf2fb436f7d43ac. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1611876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86622333aab05ea6631e912158bd06efbeba2c472469e94eefea1099fb20324c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USB8U1611873.
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
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": I. Allegro
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Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": II. Romanze: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0453c9b21f7831fa83a02489bec5f2021b614bee8ce40c0b37f69d8a8499253e. 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/USB8U1612633.
Concerto for Flute and Harp in C Major, K. 299: II. Andantino
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Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": III. Menuetto: Allegretto - Trio - Menuetto da capo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bfcc08720d92add60dbc5c20be9ac6e26c6dd12677edfc4332b558ca1a52f2. 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/USB8U1612634.
Clarinet Concerto in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78654967e7dd07b0b182bff87e31f96d2418308ba6595e46aa939287218be135. 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/USB8U1612651.
Die Zauberflöte, K. 620: Act II: Pa-Pa-Pa-Pa-Pa-Pa-Papagena! (Papageno, Papagena)
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Oboe Quartet in F Major, K. 370 (Arr. for Flute Quartet): III. Rondeau: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03417e0b7a6a7c65e9788086b7fc827e947fcda905468763f870c6ecc074bd62. 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/USB8U1612654.
Piano Sonata No. 14 in C Minor, K. 457: I. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aef8a9d3c6fe76a5664ffea62f75dea1f006086684f4b7424036ef5e780589. 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/USB8U1612655.
Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": III. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cbbf0faa94d62019973b446cd22167a7b0f7e0f9e6f0313e887408b7e9a25e. 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/USB8U1612640.
Symphony No. 41 in C Major, K. 551 "Jupiter": I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c313cb12f205b3cef0cdd225031b4d481949c215df85e0a5bb970da6007478. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USB8U1612641.
Symphony No. 41 in C Major, K. 551 "Jupiter": II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df670c8a35abca282d5bb5000cf24587945a6cc09258f7d4a87643d6b25e4d2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1612642.
Symphony No. 41 in C Major, K. 551 "Jupiter": III. Menuetto: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d83230eea47f3705e2bb44fa829c39c881beb849d2361e4b62b3aeaebe9225. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1612643.
Symphony No. 41 in C Major, K. 551 "Jupiter": IV. Molto Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0fe7c60c61234373e1fc47f9fd158cc4cdfd90a13b3204c745e587d672ff9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1612644.
Cello Concerto in A Minor, Op. 129: II. Langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2198c294bb5acd40db64498198bb7204646931ddd92e9a024a19c68b42ae6de6. 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/KRUM72400125.
Cello Concerto in A Minor, Op. 129: I. Nicht zu schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688da4b1cdd50e4ba92a0e2603930743c5dd1a1a859e013b769e517396b99ba. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRUM72400124.
Zemlinsky: Es war einmal (2021 Remastered Version)
Paul von Klenau: Concertos · Symphony No. 8
Arutiunian, Weinberg & Shostakovich: Trumpet Concertos
Trumpet Concerto in A-Flat Major (Cadenza by T. Dokshizer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c384f0b975086e24f2a9bf9b7ab1b05266c34d2af6a928111b621b787cf5db0. 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/HKI192119601.
Piano Concerto No. 1 in C Minor, Op. 35 (Arr. T. Dokshizer & P. Merkelo for Trumpet, Piano & String Orchestra): I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7479242fadbcb01899a8c3377b55328833d7831fcaf2d811133222579cd0d. 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/HKI192119605.
Piano Concerto No. 1 in C Minor, Op. 35 (Arr. T. Dokshizer & P. Merkelo for Trumpet, Piano & String Orchestra): III. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707e24b1caa80511c3c17ea6417025752a1051112ba25e9c444c0584f633f5ee. 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/HKI192119607.
Mozart: Piano Concerto No. 20 in D Minor, K. 466 & Piano Concerto No. 23 in A Major, K. 488
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aed5d9d5a4869c71f91bfb1bb3ed0b0960955707238a3eaee84d984c5a4693. 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/NLE422312504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d500fb9db5c2589aefeb2645a0d04c81422706970622647da1a149f50b4105e. 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/NLE422312505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3bc9dadd066a3e70c46f21cd39d0ffc3a29ed3e3fdbbdc1da680218790ca5. 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/NLE422312506.
Requiem in E-Flat Minor: VII. Domine Jesu Christe
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Requiem in E-Flat Minor: XI. Quia pius es - XII. Requiem aeternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dfa4e801efed153851e83b702f651dee643186dceb095ab0f003c5b7ed8a15. 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/NLE422312511.
Requiem in E-Flat Minor: I. Requiem et Kyrie
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e27c8b2194465ccdd954cfea43c3e9a19001936c69ee26a1bb30724fbdcc33. 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/NLE422312502.
Requiem in E-Flat Minor: III. Tuba mirum
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb82b5a73b22f254bae2354d041b101482cd17c72b903f6dbeb14636a34e5030. 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/NLE422312508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf537bf98cdb6e9b87ee3ab4f6732585bc3661649692cf56a0f816576725c458d. 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/NLE422312509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f924be910ee2544d54b46c29d750d48fa0a6a8411ccecced887b11b1c6552a2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422312510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1305ef48c88f425fce4ef959fcbea5b3c7124a9efa86bc87ec2151543a3aa145. 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/GBHZU1407601.
Carmina Burana: II. Fortune piango vulnera
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbffc60855b601b745644b748ea786298804d4b593220410fd2ca0a80e98faae. 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/GBHZU1407603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d32a8e79d2f258b1d74559aa406275529f4412ba6f70e2a9e642971f4051955. 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/GBHZU1407611.
Carmina Burana: XXII. Tempus est iocundum
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b4fffc351323651fc5eaa1e9192938021d217bb9bfee515fe4e813b76fd2f. 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/GBHZU1407624.
Carmina Burana: XXV. O Fortuna (Reprise)
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Carmina Burana: XIV. In taberna quando sumus
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Complete Works for Viola Vol. 1 "Viola and Orchestra"
Das Lied von der Erde (Song of the Earth): I. Das Trinklied vom Jammer der Erde (The Drinking Song of Earth's Misery)
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Das Lied von der Erde (Song of the Earth): II. Der Einsame im Herbst (The Lonely One in Autumn)
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Das Lied von der Erde (Song of the Earth): V. Der Trunkene im Fruhling (The Drunkard in Spring)
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Das Lied von der Erde (Song of the Earth): VI. Der Abschied (The Farewell)
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Das Lied von der Erde (Song of the Earth): III. Von der Jugend (Of Youth)
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Das Lied von der Erde (Song of the Earth): IV. Von der Schonheit (Of Beauty)
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Mozart: Symphonien Nos. 9, 10, 43, 42 & 35, "Haffner"
Mozart: Symphonien Nos. 7, 7a, 55, 31, "Pariser"
Mozart: Symphonien Nos. 6, 8, 38, "Prague"
Symphony No. 38 in D Major, K. 504, "Prague": II. Andante
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Symphony No. 6 in F Major, K. 43: II. Andante
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Symphony No. 6 in F Major, K. 43: IV. Allegro
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Symphony No. 8 in D Major, K. 48: II. Andante
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Symphony No. 8 in D Major, K. 48: III. Menuetto
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Symphony No. 8 in D Major, K. 48: IV. Molto allegro
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Symphony No. 38 in D Major, K. 504, "Prague": I. Adagio - Allegro
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Symphony No. 38 in D Major, K. 504, "Prague": III. Finale. Presto
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Symphony No. 6 in F Major, K. 43: I. Allegro
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Symphony No. 6 in F Major, K. 43: III. Menuetto
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Symphony No. 8 in D Major, K. 48: I. Allegro
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Mozart: Symphonien Nos. 23, 24, 25, 26, 50
Mozart: Symphonien Nos. 15, 16, 17, 18, 22
Mozart: Symphonien Nos. 12, 13, 14, K. 111a, K. 120 and K. 196
Mozart: Symphonien No. 39, K. 16a, K. 19a
Mozart, W.A.: Symphonies Nos. 7, 7A, 8, 43, 55
Mozart, W.A.: Symphonies Nos. 40 and 41, "Jupiter"
Symphony No. 40 in G Minor, K. 550: I. Molto allegro
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Mozart, W.A.: Symphonies Nos. 38, "Prague" and 39
Liszt: Piano Concertos Nos. 1 - 3 / Piano Concerto in Hungarian Style
Holten: Sinfonia Concertante & Clarinet Concerto
Zemlinsky, A. Von: Es War Einmal … [Opera]