Moscow Academy of Choral Art
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genre: choral
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followers: 33
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T08:11:48Z
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track: Un ballo in maschera, Act II: Ecco l'orrido campo - Ma dall'arido stelo

Un ballo in maschera, Act II: Ecco l'orrido campo - Ma dall'arido stelo
type: MusicRecording
duration: PT9M9S
duration ms: 549573
explicit: false
by artist: Giuseppe Verdi
by artist: Sondra Radvanovsky
by artist: Moscow Academy of Choral Art
by artist: Philharmonia of Russia
by artist: Constantine Orbelian
in album: Verdi: Arias
  type: MusicAlbum
  date published: 2010-04-27
genre: classical
genre: opera
isrc code: USASX1040403
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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: 2026-07-08T08:56:20Z
audio: Un ballo in maschera, Act II: Ecco l'orrido campo - Ma dall'arido stelo
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  additional property: Danceability
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  additional property: Key Name
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    value: C
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    value: Major