珀
type: MusicGroup
popularity: 20
followers: 3078
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bcf7e8902c367d79142d61e717598d8b10276c4ea82b7b279ec3367d22bda4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce900e00-0fff-4d36-9a81-ad82312bfbca.json and https://artists.proofprofile.net/proofs/artist/ce900e00-0fff-4d36-9a81-ad82312bfbca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:57:35Z
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album: たんぽぽ
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  date published: 2022-09-14
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  track: 気づいたら
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  track: 言えない想い - feat.珀
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  track: 私じゃなかった？
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    audio: 私じゃなかった？
  track: まだ会えてないのに - Prod.上野大樹
  track: 僕はいつでも
album: ファインダー （starring 珀）
album: イミテイション （starring 珀）
album: まだ誰一人と知らない話を
album: disbelief
album: Grieve
album: 邂逅の旋律
album: ユーフォリック
album: 碧落の地より
album: 眩耀
album: Repent
album: FICTION
album: 片道旅行記
album: ひカゲもの
album: ツバサ (feat.珀)
track: 言えない想い - feat.珀
track: ファインダー （starring 珀）
track: イミテイション （starring 珀）
track: まだ誰一人と知らない話を
track: 糠星の備忘録
track: 眩耀 - AL Version
track: 涙淵に沈む - AL Version
track: Grieve
track: Nocturnal
track: ユーフォリック
track: Angraecum
track: FICTION - AL Version
track: 邂逅の旋律
track: ひカゲもの - AL Version
track: 残照とハナムケ
track: 碧落の地より - AL Version
track: fragment
track: disbelief

私じゃなかった？
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まだ会えてないのに - Prod.上野大樹
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僕はいつでも
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ファインダー （starring 珀）
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イミテイション （starring 珀）
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まだ誰一人と知らない話を
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track: 糠星の備忘録
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track: 眩耀 - AL Version
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track: 涙淵に沈む - AL Version
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track: Grieve
track: Nocturnal
track: ユーフォリック
track: Angraecum
track: FICTION - AL Version
track: 邂逅の旋律
track: ひカゲもの - AL Version
track: 残照とハナムケ
track: 碧落の地より - AL Version
track: fragment

Grieve
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Nocturnal
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ユーフォリック
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邂逅の旋律
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ひカゲもの - AL Version
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残照とハナムケ
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碧落の地より - AL Version
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fragment
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disbelief
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Grieve
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邂逅の旋律
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ユーフォリック
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碧落の地より
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眩耀
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Repent
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FICTION
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片道旅行記
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ひカゲもの
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ツバサ (feat.珀)
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言えない想い - feat.珀
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ファインダー （starring 珀）
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イミテイション （starring 珀）
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まだ誰一人と知らない話を
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糠星の備忘録
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眩耀 - AL Version
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涙淵に沈む - AL Version
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Grieve
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Nocturnal
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ユーフォリック
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Angraecum
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FICTION - AL Version
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邂逅の旋律
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ひカゲもの - AL Version
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残照とハナムケ
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碧落の地より - AL Version
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fragment
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disbelief
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Grieve
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duration: PT3M0S
duration ms: 180233
explicit: false
by artist: 珀
in album: Grieve
  type: MusicAlbum
  date published: 2022-12-07
isrc code: JPB602204666
audio: Grieve
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 169.588
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.329
  additional property: Energy
    type: PropertyValue
    value: 0.707
  additional property: Speechiness
    type: PropertyValue
    value: 0.216
  additional property: Acousticness
    type: PropertyValue
    value: 0.091
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.11
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.735
  additional property: Loudness (dB)
    type: PropertyValue
    value: -3.634

邂逅の旋律
type: MusicRecording
duration: PT3M13S
duration ms: 193059
explicit: false
by artist: 珀
in album: 邂逅の旋律
  type: MusicAlbum
  date published: 2022-10-05
isrc code: JPB602203591
audio: 邂逅の旋律
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 168.11
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 4
  additional property: Danceability
    type: PropertyValue
    value: 0.543
  additional property: Energy
    type: PropertyValue
    value: 0.758
  additional property: Speechiness
    type: PropertyValue
    value: 0.102
  additional property: Acousticness
    type: PropertyValue
    value: 0.73
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.631
  additional property: Loudness (dB)
    type: PropertyValue
    value: -4.349