Mavra
type: MusicGroup
description: Mavra () is a one-act comic opera composed by Igor Stravinsky, and one of the earliest works of Stravinsky's neo-classical period. The libretto, by Boris Kochno, is based on Alexander Pushkin's The Li
popularity: 4
followers: 313
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-17T08:10:43Z
album: Saklı
  type: MusicAlbum
  date published: 2022-10-21
album: Kırdıysam Eğer
  type: MusicAlbum
  date published: 2023-01-27
  track: Kırdıysam Eğer
    type: MusicRecording
    duration: PT3M19S
    duration ms: 199908
    explicit: false
    by artist: Mavra
    in album: Kırdıysam Eğer
      type: MusicAlbum
      date published: 2023-01-27
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    additional property: OTSVerifyInstructions
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-05T10:01:46Z
    audio: Kırdıysam Eğer
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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        value: 1
      additional property: Time Signature
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        value: 3
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
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      additional property: Key Name
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      additional property: Mode Name
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