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album: Defying Destiny
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  date published: 2024-07-05
  track: 4 Preludes, Op. 17: No. 2, Con molto sentimento
  track: 6 Preludes: No. 1 in A-Flat Major
album: van Bree: String Quartets No. 1 & 2
  type: MusicAlbum
  date published: 2024-01-12
album: Chopin: Ballades Nos 2 & 4, Scherzo No. 4, Mazurkas & Waltzes
  type: MusicAlbum
  date published: 2023-05-26
album: Catoire: String Quartet, Op. 23 & Piano Quintet, Op. 28
  type: MusicAlbum
  date published: 2023-04-14
album: Clara Wieck, Brahms, Liszt, Schumann & Godowsky: Fantasiebilder aus Wien (Piano Works)
  type: MusicAlbum
  date published: 2022-01-21
album: Dvořák: Legends & From the Bohemian Forest (Versions for Piano Four-Hands)
  type: MusicAlbum
  date published: 2021-04-30
album: Sonata reminiscenza
  type: MusicAlbum
  date published: 2018-08-17
album: Tanejew: Piano Chamber Music
  type: MusicAlbum
  date published: 2014-05-06
album: Catoire: Poems for Voice and Piano
  type: MusicAlbum
  date published: 2013-07-05
album: Johannes Brahms: Sonate für Klarinette und Klavier, Op. 120 - Fantasien für Klavier solo, Op. 116
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  date published: 2012-11-08
album: Frédéric Chopin
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album: Frédéric Chopin - Late Works
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  date published: 2010-07-01
album: Catoire: Works for Violin and Piano
  type: MusicAlbum
  date published: 2010-05-26
album: Vergessene Weisen
  type: MusicAlbum
  date published: 2009-06-18
album: Shostakovich: Prelude B Minor Op. 87 No. 6
  type: MusicAlbum
  date published: 2024-06-28
album: 3 Romances, Op. 21: I. Andante in A Minor
  type: MusicAlbum
  date published: 2022-01-07
album: From the Bohemian Forest, Op. 68, B. 133: V. Silent Woods (Lento e molto cantabile)
  type: MusicAlbum
  date published: 2021-04-09

4 Preludes, Op. 17: No. 2, Con molto sentimento
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audio: 4 Preludes, Op. 17: No. 2, Con molto sentimento
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6 Preludes: No. 1 in A-Flat Major
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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