前田琴音
type: MusicGroup
genre: singer-songwriter
popularity: 4
followers: 218
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2ef36406ecec817c91e580d27f3338a7e47d8c445fdbcf5f0a384b508586506a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954593
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954593
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf41ea9d-005f-4c3c-8d14-311cf11ab55d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bf41ea9d-005f-4c3c-8d14-311cf11ab55d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bf41ea9d-005f-4c3c-8d14-311cf11ab55d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:46:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2ef36406ecec817c91e580d27f3338a7e47d8c445fdbcf5f0a384b508586506a","name":"前田琴音","registered_at":"2026-06-20T18:24:59Z","symbol":"NIM1680580","token_address":"0xf2054df186e40eaab5923e9d7ba0b262e47c3b7b","type":"artist","uuid":"bf41ea9d-005f-4c3c-8d14-311cf11ab55d"}
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 → 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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef36406ecec817c91e580d27f3338a7e47d8c445fdbcf5f0a384b508586506a. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf41ea9d-005f-4c3c-8d14-311cf11ab55d.json and https://artists.proofprofile.net/proofs/artist/bf41ea9d-005f-4c3c-8d14-311cf11ab55d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:46:01Z
  text: {"copyright_id":"0x2ef36406ecec817c91e580d27f3338a7e47d8c445fdbcf5f0a384b508586506a","name":"前田琴音","registered_at":"2026-06-20T18:24:59Z","symbol":"NIM1680580","token_address":"0xf2054df186e40eaab5923e9d7ba0b262e47c3b7b","type":"artist","uuid":"bf41ea9d-005f-4c3c-8d14-311cf11ab55d"}
album: ミラーボール（一発録りver）
  type: MusicAlbum
  date published: 2020-02-12
album: どんな答えも正解なんだ
  type: MusicAlbum
  date published: 2020-02-12
album: fearless heart
  type: MusicAlbum
  date published: 2020-02-12
album: 君の待ってる街まで
  type: MusicAlbum
  date published: 2022-06-29
album: ラブレター
  type: MusicAlbum
  date published: 2022-08-24
album: 今夜は君と僕と
  type: MusicAlbum
  date published: 2022-10-26
album: YOUR COLER MUSIC
  type: MusicAlbum
  date published: 2023-05-21
album: ヒロイン
  type: MusicAlbum
  date published: 2025-01-15
album: 愛liveyou
  type: MusicAlbum
  date published: 2025-02-12
album: ￥3000 (+1d)
  type: MusicAlbum
  date published: 2025-03-12
  track: ￥3000 (+1d)
    type: MusicRecording
    duration: PT4M48S
    duration ms: 288500
    explicit: false
    by artist: 前田琴音
    in album: ￥3000 (+1d)
      type: MusicAlbum
      date published: 2025-03-12
    genre: singer-songwriter
    isrc code: TCJPE2514732
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T06:29:07+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa9aa27f97d44a7a05d24a81c1c5556b87f234b5765b38cc272b1d67c8cbafe05
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959107
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959107
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPE2514732
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T07:19:23Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      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 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
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aa27f97d44a7a05d24a81c1c5556b87f234b5765b38cc272b1d67c8cbafe05. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPE2514732.
      date published: 2026-07-22T07:19:23Z
    audio: ￥3000 (+1d)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 185.445
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.435
      additional property: Energy
        type: PropertyValue
        value: 0.17
      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.826
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.162
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.348
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.798
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 明日も生きようと思える今日をすごしたい
  type: MusicAlbum
  date published: 2025-04-16
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  type: MusicAlbum
  date published: 2025-05-18
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  type: MusicAlbum
  date published: 2025-06-13
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  type: MusicAlbum
  date published: 2025-07-23
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  type: MusicAlbum
  date published: 2025-08-20
album: うたおう
  type: MusicAlbum
  date published: 2025-11-05