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type: MusicGroup
genre: j-pop
popularity: 16
followers: 11096
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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 → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf39c2f8ea665dd5f5054673cb8c11e69147d42a28a3065fdd9bbbddc2db72e. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaf45ff2-a4ad-4170-be68-cdfe939f270c.json and https://artists.proofprofile.net/proofs/artist/aaf45ff2-a4ad-4170-be68-cdfe939f270c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T06:12:23Z
album: Groovy Covers Vol. I
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  date published: 2018-08-09
  track: Ai wo Tsutaetaidatoka - A Cappella Cover Ver.
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  track: Kataomoi - A Cappella Cover Ver.
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  track: Lemon - A Cappella Cover Ver.
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  track: Todokanaikara - A Cappella Cover Ver.
  track: Uchiage Hanabi - A Cappella Cover Ver.
album: Groovy Covers Vol. II
album: Groovy Covers Vol. III
album: Groovy Covers Vol. IV
album: Kokodake no Hanashi
album: ココダケノハナシ
album: Kokodake no Hanashi (A Cappella Ver.)
album: 人生いつも三遊間
album: Jinsei Itsumo Sanyukan
album: clover
album: 終止符宣言
album: Syushihu Sengen
album: Halcion Days
album: Kawaii Never Die
album: Biscuit Strategy
album: ビスケット・ストラテジー
album: Popping Shower Love
album: Seisyun Piero
album: 青春ピエロ
album: Sweat
album: スウェット
album: Petrichor wo Eien ni
album: ペトリコールを永遠に
album: Shunjin
album: 春塵
album: Uso no Aji
album: 嘘の味
album: Lemon Cider
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album: 青写真
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track: Kokodake no Hanashi
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track: 人生いつも三遊間
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track: トドカナイカラ - A Ceppalla Cover Ver.
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track: Prayer X - A Cappella Cover Ver.
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Todokanaikara - A Cappella Cover Ver.
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Uchiage Hanabi - A Cappella Cover Ver.
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track: カタオモイ - A Cappella Cover Ver.
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track: もう切ないとは言わせない - A Cappella Cover Ver.
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track: Lemon - A Cappella Cover Ver.
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track: トドカナイカラ - A Ceppalla Cover Ver.
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Groovy Covers Vol. II
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track: 馬と鹿 - A Cappella Cover Ver.
track: 愛にできることはまだあるかい - A Cappella Cover Ver.
track: ハゼ馳せる果てるまで - A Cappella Cover Ver.
track: ドラマツルギー - A Cappella Cover Ver.
track: MOIL - A Cappella Cover Ver.

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ドラマツルギー - A Cappella Cover Ver.
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ココダケノハナシ
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Kokodake no Hanashi (A Cappella Ver.)
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人生いつも三遊間
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Jinsei Itsumo Sanyukan
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clover
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clover
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終止符宣言
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Halcion Days
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Halcion Days
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Kawaii Never Die
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Kawaii Never Die
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Biscuit Strategy
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ビスケット・ストラテジー
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Popping Shower Love
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Popping Shower Love
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Seisyun Piero
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青春ピエロ
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Sweat
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スウェット
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Petrichor wo Eien ni
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ペトリコールを永遠に
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Shunjin
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春塵
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Uso no Aji
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嘘の味
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Lemon Cider
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Lemon Cider
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Ghost
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Ghost
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Lemon - A Cappella Cover Ver.
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愛を伝えたいだとか - A Cappella Cover Ver.
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Petrichor wo Eien ni
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Seisyun Piero
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Lemon - A Cappella Cover Ver.
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Shunjin
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トドカナイカラ - A Ceppalla Cover Ver.
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clover
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Lemon Cider
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Prayer X - A Cappella Cover Ver.
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Halcion Days
type: MusicRecording
duration: PT2M55S
duration ms: 175317
explicit: false
by artist: Ratrium
in album: Halcion Days
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  date published: 2020-07-29
isrc code: JPZ922007848
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