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 0x1bd6f050c6470dc0c9607c8b6289d9e2e2a691c5a366a65e789293b6758ce1e6. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2e59990-60a8-4c32-82b7-caca7e2c45a6.json and https://artists.proofprofile.net/proofs/artist/f2e59990-60a8-4c32-82b7-caca7e2c45a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x3f50a8e8727f4a7c90c9f44cc0b10c745f8ec0e654a9ca68ed54804ea6789074. 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/SEWDL0741302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c952f621d4286a20351ae834e6b44aebd1bed8e7015b00f8026b292dabda38b. 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/USZDG0600979.
Trumpet Concerto in E-Flat Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ddc1c3260838dee4d6c03f62f8b4cd51a5704c63c131208c27bcdd290e0ce3. 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/SEWDL0706410.
Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 1 in E Major, RV 269, "La primavera" (Spring): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266340f846980e11c7624aec24b63c6e16c0e88c88afd3ad3f4ea074c4523d04. 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/SEWDL0721501.
Concerto in D Minor for Flute and Orchestra, Wq 22: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa76a90bb75810c6ab02a221892c5344415a853bdd61e3caba0dfc3a5b6053. 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/SEWDL0769901.
Sonata No. 12 in D Minor, Op. 5, "La Follia": Variations over an old Spanish Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2612f8279865829c5ed7e381d8172b3e62a786fd110626fd6c447fb071e6fa92. 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/SEWDL9430578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2037d7e48fcd5edade9e7bac982236bba6e096f9d222fdddb62579bc521f9d32. 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/DEB790303443.
Solomon, HWV 67: The Arrival of the Queen of Sheba
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Trumpet Voluntary in D Major (The Prince of Denmark's March)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfa3f7608971384a775a519047ddef9e70c00927c2e0923126191835f23eee1. 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/SEWDL0749710.
Concerto in D Minor for Guitar and Orchestra, FWV L:d 1: III. Un poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508a50437958764a08a03fa9ff85e8a7caa938d33196b6a916c63578f55b3880. 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/SEWDL0763003.
Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 3 in F Major, RV 293, "L'autunno" (Autumn): I. Ballo e canto de villanelli: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa041e9e42438b6a2d1f0f7d0685dc5b56a410451de5df8301551c272a1e4a72e. 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/SEWDL0721507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1dba99a84431737059c28acad5bf9cdc9c160cc61a562d15087997cc0e007f. 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/SEWDL0794903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64316dc7060c92fb240d1d7997fe9d1b50dd876a6c5717b4fceb1b4d92a68730. 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/SEWDL0711110.
Concerto in G Major for Viola and Orchestra, TWV 51:G9: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed0e377e7890cc4c4b9cbbc47f5a6488eb7e65616fb15d75b4e718d63006b86. 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/SEWDL0710604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7de4835953bc74808e9e1adc664ca400ea8e379505681490daeecce010e96d. 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/SEWDL9750007.
Concerto grosso in D Major, Op. 6,4: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e31b81632f6946707541b6c28f9a885864dc9d537a1970603764f019f9d65a. 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/SEWDL0781601.
Concerto in D Major for Trumpet and Organ: I. Pomposo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea17994ea19426fc9436d1a427a3214629f6e649cd9d1f3fde5231c66437da6. 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/SEWDL0706401.
Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 4 in F Minor, RV 297, "L'inverno" (Winter): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace7395630a8352977e0bf6f2f79061361edfff075174ffee9c4cc57a085a07. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEWDL0727809.
The Four Seasons, Violin Concerto No. 1 in E Major, RV 269 "Spring": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266340f846980e11c7624aec24b63c6e16c0e88c88afd3ad3f4ea074c4523d04. 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/SEWDL0721501.
Canon and Gigue in D Major, P. 37: I. Canon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68270bc034066cf4b80d26164dbd820faf25d9c7c3394d428e30c325b6f3e124. 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/USZDG0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633f3a7eb1cf24c1fcaae20c21549c95bf3d6105149f85cb6bee8b9bb6548560. 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/USZDG0600544.
Brandenburg Concerto No. 3 in G Major, BWV 1048: I. Allegro
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Johann Wenzel Stamitz: Symphony No. 6, Op. 4 - Flute & Clarinet Concertos
Franz Liszt - Fantasía y Fuga Sobre Coral
De la Musica Antigúa al Barroco - Bach - Handel
Haydn: Organ Concertos - Sinfonia Concertante
Zipoli: Pastorale for Organ (Digitally Remastered)
Vierne: Carillon de Westminster in D Major, Op. 54, No. 6 (Digitally Remastered)
Pachelbel: Vom Himmel Hoch da Komm Ich Her (Digitally Remastered)
Guilmant: Pastorale for Organ, Op. 42, No. 1 (Digitally Remastered)
Franck: Pastorale in E Major, Op. 19 (Digitally Remastered)
Brahms: Es ist ein Ros entsprungen for Organ (Digitally Remastered)
J.S. Bach: Herz und Mund und Tat und Leben, BWV 147 (Digitally Remastered)
Černohorský: Toccata for Organ in C Major (Digitally Remastered)
Buxtehude: In dulci jubilo for Organ, BuxWV 197 (Digitally Remastered)
100 Most Relaxing Classical Music In The Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dddaec613a96e0ad0a9124ddf605e447feba666ab93bcf72ed9d18465f797fc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USSJ10813855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca81732f5c71c10dfe9d61d333967ff300aa2b737b10e9e6bb1d4d7645b9d64. 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/USSJ10813893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1a09877249f42012bbd7cfb35400dba0b0ee1e41ae65710b19e92101781df0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:26:46Z), 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/USSJ10813856.
The Four Seasons, Concerto No. 4 In F Minor (L'inverno / Winter) RV. 297 (Op. 8, No. 4): II. Largo
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Piano Concerto In A Minor, Op. 16: II. Adagio
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2122c2f3d7297c1f3145c8f2244584ca3e1540f792494716fa8207306ff8c320. 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/USSJ10813869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ed3a8cb663a561e8ec0bda20722911184421b2d72fe20b2cd7b24fc4f27c08. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USSJ10813886.
Prelude To The Afternoon Of A Faun (Prelude A I'apres-Midi D'un Faune)
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Piano Sonata No. 14 In C-Sharp Minor Op 27, No. 2 "Moonlight": I. Adagio Sostenuto
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Songs Without Words, Op. 62: No. 6 in A Major: Molto allegro vivace "Fruhlinglied" (Spring Melody)
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Piano Concerto No. 21 In C K. 467: II. Andante
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Water Music Suite No. 1 In F Major, HV 348: V. Air
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92df1bba7f68e9a93aacaa6f3bf2a168030f80cdcd6f6fdc651773a9485da36. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSJ10813872.
Well Tempered Klavier, Book I, No. 22 BWV 867
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The Four Seasons: Concerto No. 1 In E Major, Op. 8, RV 269, "Spring": I. Allegro (Danza Pastorale)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3554c391c09eff198e10e4cf34116d1e4c421808fff2a867bcc86e9b26d6fb. 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/USSJ10813899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b14ff080ae9fa1dc8c9705038a1531f4a9ee133a78f7df2e0380f19fd6d25f. 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/USSJ10813862.
Symphony No. 5 In C Minor, Op. 67 "Fate": II. Andante Con Moto
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Piano Concerto No. 2 In F Minor Op 21: II. Larghetto
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Orchestral Suite No. 3 in D Major, BWV 1068: Air
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The Well-Tempered Clavier: Prelude No. 1 in C Major, BWV 846
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Double Concerto in D Minor for Two Violins and Strings, BWV 1043: II. Largo ma non tanto
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Les contes d'Hoffmann (The Tales of Hoffmann): Barcarolle
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Le carnaval des animaux (The Carnival of the Animals): Le cygne (The Swan)
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Ladislav Kyselák, Capella Istropolitana and Paul Kantschieder
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Concerto No. 1 in C Major for Recorder and Strings, TWV 51:C1: III. Andante
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Concerto in G Minor for Two Cellos and Strings, RV 531: II. Largo
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Concerto in C Major for Sopranino Recorder and Strings, RV 443: II. Largo
Karl Stangenberg, Munich Chamber Orchestra and Hans Stadlmeier
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Prélude non mesure No. 13 in F Major for Harpsicord
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Sonata in C Major for Recorder and Basso Continuo, HWV 365: I. Larghetto
Karl Stangenberg, Alfred Lessing and Max Frey
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Concerto No. 13 in A Minor for Oboe and Strings, RV 463: II. Largo
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L'estro armonico, Op. 3 - Concerto No. 9 in D Major for Violin and Strings, RV 230: II. Larghetto
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Concerto Grosso No. 1 in D Major, Op. 6: III. Largo - Allegro
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Concerto for Oboe and Violin in B-Flat Major, R. 548: II. Largo
Pavel Popov, Renaissance Chamber Orchestra and Stanislav Gorkovenko
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Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": I. Allegro
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Symphony No. 5 in C Minor, Op. 67 "Fate": I. Allegro con brio
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Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso - Allegro con spirito
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Nocturnes, Op. 9: No. 2, Andante in E-Flat Major
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String Quintet In E major Op. 11 No. 5: Minuetto In A
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Three Gymnopédies (1888): Gymnopédie No. 1
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Three Gymnopédies (1888): Gymnopédie No. 2
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Gesang der Geister über den Wassern (C Major), Op. 167/D.714
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Symphony No. 49 in F Minor, Hob. I:49 "La Passione": III. Minuet
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Enciclopedia de la Música Clásica Vol. 3