山本 コウタロー
type: MusicGroup
genre: enka
genre: folk
genre: kayokyoku
popularity: 27
followers: 2674
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additional property: OTSVerifyInstructions
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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 0x402c77a2f392235488817519b2f7188cad84743ed5792d8967cc64b2b9a51e69. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a598878-2547-4974-984f-8dbb96f1076a.json and https://artists.proofprofile.net/proofs/artist/4a598878-2547-4974-984f-8dbb96f1076a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
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album: ハロー！ウィークエンド
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  date published: 1970-01-01
  track: 春はどこから
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  track: (友だちの詩) テーマ
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  track: 白い帽子
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  track: 明日もここで会おうよ
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  track: 空いっぱい
  track: 風になってしまおう
  track: 岬めぐり
  track: サーフィン サマーナイト
  track: さよなら夏の日
  track: 君もいっしょに来ないか
  track: 浜辺
  track: カーニバル
  track: あきちゃんの横顔
album: ウィークエンド・セカンド 虹を下さい
album: 卒業記念
album: 岬めぐり / 落葉の舗道 BESTタッグ
track: 岬めぐり
track: 落葉の舗道
track: さよなら夏の日
track: はぐれ雲
track: (友だちの詩) テーマ
track: 風になってしまおう
track: 白い帽子
track: 明日もここで会おうよ
track: かすみ草
track: かげふみ
track: 早く春が来ないかしら
track: 今日は一日
track: 春はどこから
track: 笹舟のように
track: あきちゃんの横顔
track: 僕を郵便で
track: もう一度
track: めぐる季節に
track: ヘイの高い家

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空いっぱい
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風になってしまおう
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岬めぐり
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サーフィン サマーナイト
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さよなら夏の日
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君もいっしょに来ないか
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浜辺
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カーニバル
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あきちゃんの横顔
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ウィークエンド・セカンド 虹を下さい
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track: 通りすぎて
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track: かげふみ
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track: 笹舟のように
track: はぐれ雲
track: すくすく
track: 星のファンタジー
track: 夏・夕立
track: 東京の詩
track: 虹を下さい

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笹舟のように
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はぐれ雲
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すくすく
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星のファンタジー
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夏・夕立
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東京の詩
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虹を下さい
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卒業記念
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track: 好きよ好きよ郵便屋さん
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track: 早川義夫さんに捧げる唄
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track: かすみ草
track: 人生は旅だよ
track: ヘイの高い家
track: ボクは二人の船長さん
track: 早く春が来ないかしら
track: 今日は一日

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かすみ草
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人生は旅だよ
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ヘイの高い家
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ボクは二人の船長さん
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早く春が来ないかしら
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今日は一日
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岬めぐり / 落葉の舗道 BESTタッグ
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岬めぐり
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岬めぐり
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落葉の舗道
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さよなら夏の日
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はぐれ雲
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(友だちの詩) テーマ
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風になってしまおう
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白い帽子
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明日もここで会おうよ
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かすみ草
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かげふみ
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早く春が来ないかしら
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今日は一日
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春はどこから
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笹舟のように
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あきちゃんの横顔
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僕を郵便で
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もう一度
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めぐる季節に
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ヘイの高い家
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