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 0xd8b409e832a96fc6ea1e32d01e13f08f4e20ca44bd063be13f40070f0c2a5566. 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/93ffb102-59c0-47d5-a63f-04aa5ef4aa33.json and https://artists.proofprofile.net/proofs/artist/93ffb102-59c0-47d5-a63f-04aa5ef4aa33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Concerto No. 1 in D Minor, Op. 15: I. Maestoso
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 0x1374ad7d4fd76e77b6c72f3f084656708792496f6a15efa82fe2cb8b46219f79. 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/GBASH2373201.
Piano Concerto No. 2 in B-Flat Major, Op. 83: IV. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b28acd7357410f5579a64030eb5cd047550996e72c2f0440aef3ad75d282343. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBASH2373207.
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
Jörg Widmann: Drittes Labyrinth | Polyphone Schatten
Shostakovich: Cello Concertos Nos. 1 & 2
Cello Concerto No. 1 in E-Flat Major, Op. 107: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6c62a726e029058428b313b0cf0d3f223c522ce77121dc1edb8522e810955f. 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/GBAJY2034001.
Bacewicz: Complete Symphonic Works, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff5b17a6c8852e00cbc157ae54c48b21e95e970cc7aa0005fd8445acbaf054. 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/DEB202366001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee411622bb3972e4e17340de35c5b739c1537dbb4495748ba9b623b33e1d0924. 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/DEB202366002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba0d9f9647757dcb3fe18133400e2fa1d3cbeb4733ab7e20e0d37fec0965a5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB202366004.
Symphony No. 2: IV. Finale. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282af1aa6f3f2b93ee6fff06fc0b21b4b51e701d878f2f8d85cfb28d0a17e0a. 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/DEB202366005.
BERLIN 1923 - Beethoven & Schulhoff: Piano Concertos
Weinberg: Cello Concerto in C Minor, Op. 43: II. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6cd297bbf7582307bad1a5d47a655737d55bb6e393fde80e0f469a7acc3f1f. 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/GBPFW2200303.
Weinberg: Cello Concerto in C Minor, Op. 43: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cb52355347b468da2f8a388668e6683f16aede497e0a99fc926c61d9d4326a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:25:31Z), 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/GBPFW2200302.
Weinberg: Cello Concerto in C Minor, Op. 43: III. Allegro - Cadenza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ac46fc331ee32e34d809ab463d0fd00f9fe2d9f92468cfb789a66653cbcc2f. 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/GBPFW2200304.
Weinberg: Cello Concerto in C Minor, Op. 43: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172f470856a8c5e00a09388b614cdae0d2b0317e73281f53cee7e1f939e0c3e8. 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/GBPFW2200305.
Dutilleux: Cello Concerto "Tout un monde lointain": I. Énigme. Très libre et flexible
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f2a7080ee30d89f4b23314702a1cf097ac9c4ffdd00e1aaf981c1525d3b55. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBPFW2200306.
Bacewicz: Complete Symphonic Works, Vol. 1
Bernd Alois Zimmermann - Recomposed, Vol. 3
Bernd Alois Zimmermann - Recomposed, Vol. 2
Bernd Alois Zimmermann - Recomposed, Vol. 1
Harp Concerto in E-Flat Major, Op. 74: III. Allegro giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa87935bc8b99291fdc1656b3a9948b04ef104f9e3851751f1642d963e6807e5. 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/DEE862200991.
Raymonda, Op. 57: Prélude et la Romanesca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3179706db6533f9f457a43fe423b1e1981de313ac326af6b9d6f34a82cc687b5. 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/DEE862200992.
Harp Concerto in E-Flat Major, Op. 74: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800fa07ac62be346980cbb60e46329442f26355b5b38b96ecf39105de2ae0aa. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEE862200989.
Harp Concerto in E-Flat Major, Op. 74: II. Tema con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957dd417e6440bddda7b6e40fc89c686186ae9b2d40da7f76609bdc131db8d27. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEE862200990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1d987a15208e777eb747972a4440e80eaeb7288424b08448258129ad5c00cb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEE862200994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3504eca3fc9c374b2944d250f9db7078a23636d9e802660b9febc3570fbb2c49. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEE862200995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652706d208e0013c2126aee8512a187e80fad74b56d14430912ff8b22d9fb425. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEE862200996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86349fa9f24dbdd591f6e0df37892912461c098b75575e67bc6755255f756867. 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/DEE862200997.
The Nutcracker, Op. 71: Dance of the Sugar Plum Fairy (Arr. for Harp and Orchestra by Xavier de Maistre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ffc59a96a07ddaf3cea9ed2530694020b4f82953b65a8081cd46d39d530004. 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/DEE862200998.
Dvořák: Legends Op. 59, Czech Suite Op. 39
Legends, Op. 59, B. 122: VI. Allegro con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e5db8a92af5ced1ebd985da1d234337777b24c8ea2559e02bad9275fceb4f9. 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/GBASH2271006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12495715b196f1f03f99612fd0ddc03592b17227f144346065be2a9a6e0da160. 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/GBASH2271010.
Czech Suite in D Major, Op. 39, B. 93: I. Preludium. Pastorale (Allegro moderato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c93e3ca37de09faef0a993859f8abe533440b38ed78157f74fc657958e5650. 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/GBASH2271011.
Czech Suite in D Major, Op. 39, B. 93: III. Sousedská. Minuetto (Allegro giusto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f6741cc237a97d7f0a1f8d8da0054598765fb2049552489b8d4444d3952732. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBASH2271013.
Czech Suite in D Major, Op. 39, B. 93: IV. Romance (Andante con moto)
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Legends, Op. 59, B. 122: I. Allegretto non troppo, quasi andantino
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Legends, Op. 59, B. 122: II. Molto moderato
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Legends, Op. 59, B. 122: III. Allegro giusto
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Legends, Op. 59, B. 122: IV. Molto maestoso
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Legends, Op. 59, B. 122: V. Allegro giusto
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Legends, Op. 59, B. 122: VII. Allegretto grazioso
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Czech Suite in D Major, Op. 39, B. 93: V. Finale. Furiant (Presto)
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Sarasate: Carmen Fantasy, Op. 25 (After Bizet): I. Moderato
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Prokofiev: Violin Concerto No. 2 in G Minor, Op. 63: I. Allegro moderato
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Prokofiev: Violin Concerto No. 2 in G Minor, Op. 63: II. Andante assai
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Britten: Violin Concerto in D Minor, Op.15: II. Vivace - Animando - Largamento
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Britten: Violin Concerto in D Minor, Op.15: III. Passacaglia - Andante lento (un poco meno mosso)
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Tarrega / Arr. Ricci: Recuerdos de la Alhambra
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Sarasate: Carmen Fantasy, Op. 25 (After Bizet): Introduction [Allegro moderato]
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Sarasate: Carmen Fantasy, Op. 25 (After Bizet): II. Lento assai
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Sarasate: Carmen Fantasy, Op. 25 (After Bizet): III. Allegro moderato
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Sarasate: Carmen Fantasy, Op. 25 (After Bizet): IV. Moderato
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Prokofiev: Violin Concerto No. 2 in G Minor, Op. 63: III. Allegro, ben marcato
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Britten: Violin Concerto in D Minor, Op.15: I. Moderato con moto - Agitato - Tempo primo
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Matthias Krüger: Ain't Nuthin' but Fairy Dust
Violin Concerto, Op. 77: III. Allegro giocoso, ma non troppo vivace
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Symphony No. 7 in C Major, Op. 60: I. War, allegretto (1)
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Symphony No. 7 in C Major, Op. 60: I. War, allegretto (2)
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Symphony No. 7 in C Major, Op. 60: I. War, allegretto (3)
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Symphony No. 7 in C Major, Op. 60: I. War, allegretto (7)
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Symphony No. 7 in C Major, Op. 60: I. War, allegretto (8)
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Symphony No. 7 in C Major, Op. 60: I. War, allegretto (4)
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Symphony No. 7 in C Major, Op. 60: I. War, allegretto (5)
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Symphony No. 7 in C Major, Op. 60: IV. Victory, allegro non troppo (2)
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Rachmaninoff, Strauss, Wagner & Verdi: Works
Luigi Nono: Como una ola de fuerza y Luz
Beethoven: Mass in C Major, Op. 86 - R. Schumann: Piano Concerto in A Minor, Op. 54
Symphony No. 1 in F Minor, Op. 10: II. Allegro
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Symphony No. 1 in F Minor, Op. 10: III. Lento
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Symphony No. 5 in D Minor, Op. 47: IV. Allegro non troppo
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Symphony No. 13 in B-Flat Minor for Bass, Chorus & Orchestra, Op. 113 "Babi Yar": I. Babi Yar. Adagio
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Symphony No. 1 in F Minor, Op. 10: I. Allegretto
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Symphony No. 4 in C Minor, Op. 43: I. Allegretto poco moderato
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Symphony No. 10 in E Minor, Op. 93: II. Allegro
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Symphony No. 11 in G Minor, Op. 103 "The Year 1905": I. Palace Square. Adagio
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Symphony No. 12 in D Minor, Op. 112 "The Year 1917": I. Revolutionary Petrograd. Moderato - Allegro
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Zimmermann: Canto di speranza / Violin Concerto
De temporum fine comoedia, Pt. 1: I. Heis – Heis – theos estin
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De temporum fine comoedia, Pt. 2: VI. Upote, maepote...
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Hindemith: Cardillac; Mathis der Maler (Excerpts)
Daphne - Opera in 1 Act, Op. 82: Orchestereinleitung - "Kleontes!" / "Adrast"
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Daphne - Opera in 1 Act, Op. 82: Leb wohl du Tag
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Daphne - Opera in 1 Act, Op. 82: "Daphne!" / "Mutter!" / "Wir warten dein"
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Daphne - Opera in 1 Act, Op. 82: Ei, so fliegt sie vorbei
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Daphne - Opera in 1 Act, Op. 82: Seid ihr um mich, der Hirten alle?
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Daphne - Opera in 1 Act, Op. 82: Unheilvolle Daphne!
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Daphne - Opera in 1 Act, Op. 82: Leukippos, du?
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Daphne - Opera in 1 Act, Op. 82: Daphnes Verwandlung "Ich komme - ich komme"
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Daphne - Opera in 1 Act, Op. 82: Mondlichtmusik
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Daphne - Opera in 1 Act, Op. 82: Ich grüße dich, weiser, erfahrener Fischer
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Daphne - Opera in 1 Act, Op. 82: Was führt dich her im niedern Gewande?
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Daphne - Opera in 1 Act, Op. 82: Nicht wollen die Götter
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Daphne - Opera in 1 Act, Op. 82: Trinke, du Tochter!
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Daphne - Opera in 1 Act, Op. 82: Jeden heiligen Morgen
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Brahms: Symphony No. 4 - Wagner: Ouvertures
MOZART: LE NOZZE DI FIGARO, PIANO CONCERTO No. 20
Schulhoff: Concerto for Piano & Small Orchestra, Op. 43, WV 66: IIIb. Subito sostenuto ma alla breve. Alla zingaresca
Piano Concerto No. 2 in B-Flat Major, Op. 83: II. Allegro appassionato
Muhly/Helbig/Long: Three Continents, Shostakovich: Cello Concerto No. 2
Beethoven's World: Salieri, Hummel, Vorisek
Double Concerto in G Major, Op. 17: III. Finale. Rondo allegretto
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26 Variazioni Sull'Aria "La Follia di Spagna"
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Schulhoff: Symphonies Nos. 1, 2, 3 & 5; Concerto for String Quartet and Winds, WV 97