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subject of: OpenTimestamps Proof of Existence
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track: Concertino for Guitar and Orchestra in A Minor, Op. 72: II. Romanza

Concertino for Guitar and Orchestra in A Minor, Op. 72: II. Romanza
type: MusicRecording
duration: PT6M16S
duration ms: 376800
explicit: false
by artist: Salvador Bacarisse
by artist: Salvadore Bacarisse
by artist: Karin Schaupp
by artist: Benjamin Northey
by artist: Tasmanian Symphony Orchestra
in album: Spain: Great Guitar Concertos
  type: MusicAlbum
  date published: 2009-01-02
isrc code: AUAB00950638
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Concertino for Guitar and Orchestra in A Minor, Op. 72: II. Romanza
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  additional property: Key Name
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