Ni Ni
type: MusicGroup
genre: mandopop
description: Ni Ni (, born 8 August 1988) is a Chinese actress. After rising to fame with Zhang Yimou's The Flowers of War (2011), she starred in the films Up in the Wind (2013), Fleet of Time (2014), Lost in the
popularity: 3
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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: 2026-06-21T18:08:38Z
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track: 姐姐妹妹站起来
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  duration: PT4M30S
  duration ms: 270480
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  by artist: Zhu Zhen
  by artist: Ni Ni
  by artist: Dan Dan
  by artist: Bei Bei
  in album: 舞林大会之歌舞魅影
    type: MusicAlbum
    date published: 2014-10-07
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
  audio: 姐姐妹妹站起来
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