Matthias Rácz (born 1980) is a German bassoonist. Career Rácz was born in Berlin and began his musical education at the age of 6, first on the piano and at 10 also on the bassoon. During his school
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 0xfe886099fb4f5078fd94e1894d896518f2879fc9f989d841314e9e9232537a0d. 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/c662b135-94d9-4e84-a7e6-a6edcd5d48dd.json and https://artists.proofprofile.net/proofs/artist/c662b135-94d9-4e84-a7e6-a6edcd5d48dd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Françaix, Schnyder & Others: Chamber Music
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
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Contrabassoon Sonata, DWV 133: II. Etwas bewegt
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Contrabassoon Sonata, DWV 133: III. Lebhaft
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2 Stücke, Op. 57: No. 2, Tempo di valse grazioso
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6 Stücke, Op. 80: No. 3, Andante tranquillo
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Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
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Septet in E-Flat Major, Op. 20: III. Tempo di minuetto
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Bassoon Concerto in E-Flat Major, RV 483: I. Presto
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Bassoon Concerto in E-Flat Major, RV 483: II. Larghetto
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Bassoon Concerto in E-Flat Major, RV 483: III. Allegro
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Oboe Concerto in A Minor, RV 461: I. Allegro non molto
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Oboe Concerto in A Minor, RV 461: II. Larghetto
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Oboe Concerto in A Minor, RV 461: III. Allegro
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Bassoon Concerto in G Major, RV 493: I. Allegro ma poco
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Bassoon Concerto in G Major, RV 493: II. Largo
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Bassoon Concerto in G Major, RV 493: III. Allegro
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Oboe Concerto in D Major, RV 453: I. Allegro
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Oboe Concerto in D Major, RV 453: II. Largo
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Oboe Concerto in D Major, RV 453: III. Allegro
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Bassoon Concerto in E Minor, RV 484: I. Allegro poco
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Bassoon Concerto in E Minor, RV 484: II. Andante
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Bassoon Concerto in E Minor, RV 484: III. Allegro
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Oboe Concerto in F Major, RV 457: I. Allegro non molto
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Oboe Concerto in F Major, RV 457: II. Andante
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Oboe Concerto in F Major, RV 457: III. Allegro molto
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Concerto for Oboe & Bassoon in G Major, RV 545: I. Andante molto
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Concerto for Oboe & Bassoon in G Major, RV 545: II. Largo
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Concerto for Oboe & Bassoon in G Major, RV 545: III. Allegro molto
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Mozart: Sonata for Bassoon & Cello in B-Flat Major, K. 292 - Devienne: Bassoon Quartets, Op. 73
Françaix, Tomasi, Jolivet & Villa-Lobos: Bassoon Concertos
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Weber, Mozart & Hummel: Bassoon Concertos
Bassoon Concerto in F Major, Op. 75, J. 127: I. Allegro ma non troppo
North West German Philharmonic Orchestra
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Bassoon Concerto in F Major, Op. 75, J. 127: II. Adagio
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Bassoon Concerto in F Major, Op. 75, J. 127: III. Rondo: Allegro
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Bassoon Concerto in B-Flat Major, K. 191: I. Allegro
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Bassoon Concerto in B-Flat Major, K. 191: II. Andante ma adagio
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Bassoon Concerto in B-Flat Major, K. 191: III. Rondo: Tempo di menuetto
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Bassoon Concerto in F Major, WoO 23, S63: I. Allegro moderato
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Bassoon Concerto in F Major, WoO 23, S63: II. Romanza: Andantino e cantabile
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Bassoon Concerto in F Major, WoO 23, S63: III. Rondo: Vivace
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Andante e Rondo ungarese, Op. 35, J. 158
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Schumann, R.: 5 Stucke Im Volkston / Adagio and Allegro / Fantasiestucke / Waldszenen (Arr. for Bassoon and Piano)
5 Stucke im Volkston (5 Pieces in Folk Style), Op. 102 (arr. for bassoon and piano): No. 1. Mit Humor, "Vanitas vanitatum"
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Adagio and Allegro, Op. 70 (arr. for bassoon and piano): Langsam, mit innigem Ausdruck -
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3 Romanzen, Op. 94 (arr. for bassoon and piano): No. 1. Nicht schnell
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Waldszenen, Op. 82 (arr. M. Racz for oboe and piano after W. Renz's arrangement for oboe and piano): No. 3. Einsame Blumen
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