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track: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): I. Allegro
track: Clarinet Sonata No. 1 in F Minor, Op. 120 (orch. L. Berio): II. Andante un poco adagio
track: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): II. Intermezzo: Allegro ma non troppo
track: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): III. Andante con moto
track: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): IV. Rondo alla Zingarese: Presto
track: Clarinet Sonata No. 1 in F Minor, Op. 120 (orch. L. Berio): III. Allegretto grazioso
track: Clarinet Sonata No. 1 in F Minor, Op. 120 (orch. L. Berio): IV. Vivace

Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): I. Allegro
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genre: classical
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  date published: 2026-07-08T03:20:19Z
audio: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): I. Allegro
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Clarinet Sonata No. 1 in F Minor, Op. 120 (orch. L. Berio): II. Andante un poco adagio
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by artist: Rhenish State Philharmonic Orchestra
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  date published: 2026-07-02T05:09:12Z
audio: Clarinet Sonata No. 1 in F Minor, Op. 120 (orch. L. Berio): II. Andante un poco adagio
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Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): II. Intermezzo: Allegro ma non troppo
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duration: PT7M37S
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by artist: Arnold Schoenberg
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by artist: Rhenish State Philharmonic Orchestra
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genre: classical
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  date published: 2026-07-30T15:42:38Z
audio: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): II. Intermezzo: Allegro ma non troppo
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  value: 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

Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): III. Andante con moto
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duration: PT8M53S
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by artist: Rhenish State Philharmonic Orchestra
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  date published: 2026-07-30T09:58:01Z
audio: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): III. Andante con moto
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  value: 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

Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): IV. Rondo alla Zingarese: Presto
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  date published: 2026-07-29T13:09:35Z
audio: Piano Quartet No. 1 in G Minor, Op. 25 (arr. A. Schoenberg): IV. Rondo alla Zingarese: Presto
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Clarinet Sonata No. 1 in F Minor, Op. 120 (orch. L. Berio): III. Allegretto grazioso
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Clarinet Sonata No. 1 in F Minor, Op. 120 (orch. L. Berio): IV. Vivace
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by artist: Luciano Berio
by artist: Johannes Brahms
by artist: Karl-Heinz Steffens
by artist: Rhenish State Philharmonic Orchestra
by artist: Daniel Raiskin
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