Yuki Ishii
type: MusicGroup
genre: ambient
description: is a retired Japanese volleyball player who plays for Hisamitsu Springs. She also played for the All-Japan women's volleyball team. She competed at the 2020 Summer Olympics, in Women's volleyball.
popularity: 5
followers: 103
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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: 2026-06-21T03:45:44Z
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album: REFLECTION
  type: MusicAlbum
  date published: 2021-03-31
  track: Early Morning
    type: MusicRecording
    duration: PT1M32S
    duration ms: 92083
    explicit: false
    by artist: Yuki Ishii
    in album: REFLECTION
      type: MusicAlbum
      date published: 2021-03-31
    genre: ambient
    isrc code: TCJPO2121303
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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
    subject of: OpenTimestamps Proof of Existence
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5e9228b85a20638e2e0317690d00241156da4da2a3e7292d53330f9f6287cd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPO2121303.
      date published: 2026-07-03T09:04:44Z
    audio: Early Morning
      type: AudioObject
      additional property: Tempo (BPM)
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        value: 50
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
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      additional property: Time Signature
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        value: 4
      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)
        type: PropertyValue
        value: 0
      additional property: Loudness (dB)
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        value: -4.615
      additional property: Key Name
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        value: C
      additional property: Mode Name
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