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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aa47a420b27589fdbbb5afbcd0b25c0c561ff2a5d24082cdf35ce253443cb9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84f00b71-9297-4f33-939a-59cad6229c1d.json and https://artists.proofprofile.net/proofs/artist/84f00b71-9297-4f33-939a-59cad6229c1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anner Bylsma plays Concertos and Ensemble Works
Cello Concerto No. 1 in C Major, Hob. VIIb:1: I. Moderato
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cdac64083c564b3c6d40e6c39e50403a495b3f8ba9a54cedd92572fdcabb65. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/DEE479000153.
Cello Concerto No. 1 in C Major, Hob. VIIb:1: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0576174e88279eaf6f913928aa5d61eb3f63d83254633acbfa219f276f1a3890. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEE479000154.
Cello Concerto No. 1 in C Major, Hob. VIIb:1: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d68ed6beb8878b76110b962c11229bf51dc1001eae373353df4a2cd9f46c0a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEE479000155.
Cello Concerto No. 2 in D Major, Hob. VIIb:2: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458348a62e01f5d8c00920db4b3b503d0129a5bd6efbbaae065d4668aa83ebd7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEE479000156.
Cello Concerto No. 2 in D Major, Hob. VIIb:2: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5be68d1040e22ae7ed8ae092870139c3f759d60df021aee7c1b031e85e050d. 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/DEE479000157.
Cello Concerto No. 2 in D Major, Hob. VIIb:2: III. Rondo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa10d25ea636599d56a6d2da8008584f78ba71a3ef91ccc3f72bdd531d05baf. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEE479000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dce5ff5799c8e3cc82963af08838b8e7f8cb2eda678be8dfce246fdb5e1c1a8. 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/DEE478800383.
Cello Concerto in C Major, Op. 4: I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f614b8ebe720112e41617a39a076cd9762f8bf5b86cf701d637d4b4ac5a8dbd. 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/DEE479000202.
Cello Concerto in C Major, Op. 4: II. Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09e84fb8ad4de5e50a095156608781c2b73fc861b48e9cfab63450dfe51281a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEE479000203.
Cello Concerto in C Major, Op. 4: III. Rondo alla Cosacca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df9abcb4fa4c67a9177c6bb7c3bd404ff6b8549d6dfebb721cb556c0ddf9991. 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/DEE479000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d50c7d030e8ceb66429a6afdf596757401e40e31536dc9515fff52a0137fd2. 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/DEE471000027.
Sextet in E-Flat Major, B26: III. Rondo moderato
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Concerto for Cello, Strings and Continuo in G Major, INP 18: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4583b71c303f0a45fd545b94300b7dd934b59426b91c447247abf9576c5c2cc8. 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/DEE861400506.
Ein blonder Traum: "Irgendwo auf der Welt"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481bd3167c12d4824b7752bb33487cab63f45c304a16139baa734fbc8d7d2392. 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/DEE861300922.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f424373900359c08b505aa75fbc0abc6c4f9496c8d5b88cb30ef81f93778a4c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USSM10410290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e10513c67834f739668493805164e2d455832c15a17c3bbe2c83cb4b860503. 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/DEE470100282.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": II. Romanze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ffec3535b8a33d27c5b7a7688723f563231e97bb13f2573a5f13d5755ed15. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USSM10410291.
Le nozze di Figaro, K.492: Act II: Voi che sapete
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Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": III. Menuetto. Allegro - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea730286903480a6ac37e8560b13453660a0e6eae88efc563598d7a61657b2. 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/USSM10410292.
Die Zauberflöte, K. 620: March of the Priests
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e860d2caec10fc3315f274aef1ca249328952c75000c80576d8687b3d736ce. 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/USBC18000198.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": IV. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b445af6eee5dfb924ea54cb23778c80e78bb60e02bc10fc3918d6d088f7a1d0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USSM10410293.
Symphony No. 41 in C Major, K. 551, "Jupiter": I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46f510637ea8c86a01b4ed482427ba53888eebe406b1c1cf522189014250eed. 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/DEE470100452.
Die Zauberflöte: Dies Bildnis ist bezaubernd schön
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Symphony No. 41 in C Major, K. 551, "Jupiter": II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edb1ba52b390cbd03ecc5c17d5c1701a552fdd7da85c6ce7723823c0e606ded. 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/DEE470100453.
Die Zauberflöte, K. 620: Ach, ich fühl's
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Symphony No. 41 in C Major, K. 551, "Jupiter": III. Menuetto: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0455b5610b64323ba8d37216b99b965ea1f06d9d2de94f139c629a7b0b05b7. 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/DEE470100454.
Serenade No. 9 in D Major, K. 320 "Posthorn": II. Menuetto - Allegretto - Trio
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Symphony No. 41 in C Major, K. 551, "Jupiter": IV. Molto allegro
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Serenade No. 9 in D Major, K. 320 "Posthorn": III. Concertante - Andante grazioso
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Piano Concerto No. 21 in C Major, K. 467, "Elvira Madigan": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463da072b983cf21872aa39396ffa27cec5736c0fccfead4fa5efb25ad3e8a8a. 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/DEP620100861.
Serenade No. 9 in D Major, K. 320 "Posthorn": IV. Rondeau - Allegro ma non troppo
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Cosi Fan Tutte, Act I: "Un'aura Amorosa"
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Concerto in C Major for Flute, Harp and Orchestra, K. 299: II. Andantino
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96704c0c9fdf3acef9394d3c12d7f31e2cdb888fff52bc568d5dfb88e5e380c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEE470100297.
Concerto for Clarinet and Orchestra in A Major, K. 622: III. Rondo. Allegro
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Piano Sonata in A Major, K. 331: III. Alla turca. Allegretto
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Concerto No. 5 in A Major for Violin and Orchestra, K. 219 "Turkish": I. Allegro aperto
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Vesperae solennes de confessore, K.339: V. Laudate Dominum (Arranged for Violin & Orchestra by Joshua Bell)
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Piano Concerto No. 20 in D Minor, K. 466: II. Romance
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Anner Bylsma plays Cello Suites and Sonatas
Cello Suite No. 1 in G Major, BWV 1007: I. Prélude
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Cello Suite No. 4 in E-Flat Major, BWV 1010: I. Prélude
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Suite for Solo Cello No. 1 in G Major, BWV 1007: I. Prélude
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Cello Suite No. 1 in G Major, BWV 1007: II. Allemande
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Cello Suite No. 4 in E-Flat Major, BWV 1010: II. Allemande
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Cello Suite No. 1 in G Major, BWV 1007: III. Courante
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Cello Suite No. 4 in E-Flat Major, BWV 1010: III. Courante
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Cello Suite No. 1 in G Major, BWV 1007: IV. Sarabande
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Cello Suite No. 4 in E-Flat Major, BWV 1010: IV. Sarabande
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Cello Suite No. 1 in G Major, BWV 1007: V. Menuets I & II
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Cello Suite No. 4 in E-Flat Major, BWV 1010: V. Bourrées I & II
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Cello Suite No. 1 in G Major, BWV 1007: VI. Gigue
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Cello Suite No. 4 in E-Flat Major, BWV 1010: VI. Gigue
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Cello Suite No. 2 in D Minor, BWV 1008: I. Prélude
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Cello Suite No. 5 in C Minor, BWV 1011: I. Prélude
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Suite for Solo Cello No. 2 in D Minor, BWV 1008: I. Prélude
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Cello Suite No. 2 in D Minor, BWV 1008: II. Allemande
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Cello Suite No. 5 in C Minor, BWV 1011: II. Allemande
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Cello Suite No. 2 in D Minor, BWV 1008: III. Courante
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Cello Suite No. 5 in C Minor, BWV 1011: III. Courante
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Cello Suite No. 2 in D Minor, BWV 1008: IV. Sarabande
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Cello Suite No. 5 in C Minor, BWV 1011: IV. Sarabande
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Cello Suite No. 2 in D Minor, BWV 1008: V. Menuets I & II
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Cello Suite No. 5 in C Minor, BWV 1011: V. Gavottes I & II
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Cello Suite No. 2 in D Minor, BWV 1008: VI. Gigue
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Cello Suite No. 5 in C Minor, BWV 1011: VI. Gigue
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Cello Suite No. 3 in C Major, BWV 1009: I. Prélude
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Cello Suite No. 6 in D Major, BWV 1012: I. Prélude
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Suite for Solo Cello No. 3 in C Major, BWV 1009: I. Prélude
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Cello Suite No. 3 in C Major, BWV 1009: II. Allemande
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Cello Suite No. 6 in D Major, BWV 1012: II. Allemande
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Cello Suite No. 3 in C Major, BWV 1009: III. Courante
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Cello Suite No. 6 in D Major, BWV 1012: III. Courante
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Cello Suite No. 3 in C Major, BWV 1009: IV. Sarabande
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Cello Suite No. 6 in D Major, BWV 1012: IV. Sarabande
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Cello Suite No. 3 in C Major, BWV 1009: V. Bourrées I & II
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Cello Suite No. 6 in D Major, BWV 1012: V. Gavottes I & II
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Cello Suite No. 3 in C Major, BWV 1009: VI. Gigue
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Cello Suite No. 6 in D Major, BWV 1012: VI. Gigue
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Haydn: Missa "Sunt bona mixta malis" & Missa brevis and More
String Quintet No. 1 in A Major, Op. 18, MWV R21: I. Allegro con moto
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String Quartet in D Minor, Op. 103, Hob. III:83: I. Andante grazioso
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String Quartet in D Minor, Op. 103, Hob. III:83: II. Menuetto ma non troppo presto
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String Sextet No. 1 in B-Flat Major, Op. 18: II. Andante ma moderato
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String Sextet No. 1 in B-Flat Major, Op. 18: III. Scherzo. Allegro molto
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String Sextet No. 1 in B-Flat Major, Op. 18: IV. Rondo. Poco allegretto e grazioso
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String Sextet No. 2 in G Major, Op. 36: I. Allegro non troppo
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String Sextet No. 2 in G Major, Op. 36: II. Scherzo. Allegro non troppo
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Mozart: Clarinet Quintet in A Major, K. 581
Clarinet Quintet in A Major, K. 581 "Stadler Quintet": IV. Allegretto con variazioni
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Rondino in E-Flat Major for 2 Oboes, 2 Clarinets, 2 Bassoons and 2 Horns, WoO 25
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March for 2 Clarinets, 2 Bassoons and 2 Horns in B-flat Major, WoO 29
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Duo for Clarinet and Bassoon in C Major, WoO 27 No.1: I. Allegro commodo
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I. Allegro vivace from Symphony No. 4 in A Major, Op. 90 "Italian"
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Scherzo from A Midsummer Night's Dream, Op. 61
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Wedding March from A Midsummer Night's Dream, Op. 61
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War March of the Priests from "Athalie, Op. 74"
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Rosamunde Schauspielmusik, D. 797: Ballett No. 2
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Liebestraum No. 3 in A-Flat Major, Op. 62, S. 541
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Gymnopedie No. 3 (Orchestrated by Claude Debussy)
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Goldberg Variations, BWV 988: Aria. Andante espressivo
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Serenade for Strings in E Major, Op. 22: II. Tempo di Valse
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Symphony No. 6 in F Major, Op. 68 "Pastoral": I. Erwachen heiterer Empfindungen bei der Ankunft auf dem Lande. Allegro ma non troppo
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Notturno No. 6 in G Major, Hob. II:30: II. Andante
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Cavalleria rusticana: Act I: Intermezzo sinfonico
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Schubert: Piano Quintet in A Major "Trout", Arpeggione Sonata in A Minor & Piano Trio in E-Flat Major "Notturno"
Piano Quintet in A Major, D. 667, Op. 114 "Trout": I. Allegro vivace
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Piano Quintet in A Major, D. 667, Op. 114 "Trout": II. Andante
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Piano Quintet in A Major, D. 667, Op. 114 "Trout": III. Scherzo
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Piano Quintet in A Major, D. 667, Op. 114 "Trout": IV. Tema con variazioni
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Piano Quintet in A Major, D. 667, Op. 114 "Trout": V. Allegro giusto
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Arpeggione Sonata in A Minor, D. 821: I. Allegro moderato
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Ouverture-Suite in A Major, TWV 55:A5: IV. Gavotte
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Welche Wonne, welche Lust from Die Entführung aus dem Serail, K. 384
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Suite for Variety Orchestra: VII. Waltz No. 2 (Arr. for Cello and Chamber Ensemble)
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String Quartets: The Definitive Collection
Haydn: Die Schöpfung; Heiligmesse; Theresienmesse; Nelsonmesse; Paukenmesse etc.
Schubert: The Piano Trios; Piano Quintet "The Trout"; String Quintet; Octet D 803; Arpeggione Sonata etc.
Mozart: A Musical Joke; Clarinet Quintet; Horn Quintet; Kegelstatt Trio; String Quintets Nos. 3 & 4 etc.
Bruckner: String Quintet in F Major; Intermezzo; Rondo & String Quartet in C Minor