Masami Mitsuoka
type: MusicGroup
genre: anime
description: is a Japanese pop singer. Born and raised in Toyota, Aichi, Mitsuoka debuted in the girl group Sister Q under the stage name MASAMI in 2005. After the group disbanded of unknown reasons in October 20
popularity: 26
followers: 1787
additional property: CopyrightID
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T21:20:00Z
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album: Hana
  type: MusicAlbum
  date published: 2007-11-28
album: Distance Love
  type: MusicAlbum
  date published: 2008-08-06
album: 届かない想い...~ロードanother story~ EP
  type: MusicAlbum
  date published: 2008-11-19
album: last cross
  type: MusicAlbum
  date published: 2008-12-17
album: Black Diary
  type: MusicAlbum
  date published: 2009-01-28
album: FREE BIRD
  type: MusicAlbum
  date published: 2009-02-11
album: LOVE BRACE
  type: MusicAlbum
  date published: 2012-04-11
album: say hello good days【TYPE B】
  type: MusicAlbum
  date published: 2014-12-10
album: say hello good days【TYPE A】
  type: MusicAlbum
  date published: 2014-12-10
album: say hello good days【TYPE B】
  type: MusicAlbum
  date published: 2014-12-10
album: say hello good days【TYPE A】
  type: MusicAlbum
  date published: 2014-12-10
album: Last Cross
  type: MusicAlbum
  date published: 2017-03-23
  track: Last Cross - TV Version
    type: MusicRecording
    duration: PT1M30S
    duration ms: 90400
    explicit: false
    by artist: Masami Mitsuoka
    in album: Last Cross
      type: MusicAlbum
      date published: 2017-03-23
    genre: anime
    isrc code: JPPC00802037
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
      type: PropertyValue
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    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c93fb6a769b521717e0f9eae84654906f3208f342e2c9f4bae8d51cabbb971. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPC00802037.
      date published: 2026-07-17T19:49:21Z
    audio: Last Cross - TV Version
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 146.029
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.554
      additional property: Energy
        type: PropertyValue
        value: 0.927
      additional property: Speechiness
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        value: 0.104
      additional property: Acousticness
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        value: 0.013
      additional property: Instrumentalness
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        value: 0.002
      additional property: Liveness
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        value: 0.272
      additional property: Valence (Positivity)
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        value: 0.531
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.194
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Hana
  type: MusicAlbum
  date published: 2017-11-01