Kana Matsumoto
type: MusicGroup
popularity: 5
followers: 209
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1fcefe088998b4995be7aa3f701bc2d5649a01d46d691300f8d19851e3da64e3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954513
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f701f30-3165-4879-9686-fa36c59c1fd8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f701f30-3165-4879-9686-fa36c59c1fd8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9f701f30-3165-4879-9686-fa36c59c1fd8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T06:31:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1fcefe088998b4995be7aa3f701bc2d5649a01d46d691300f8d19851e3da64e3","name":"Kana Matsumoto","registered_at":"2026-06-20T05:16:35Z","symbol":"NIM1522940","token_address":"0xe2ff52573e6eade4b81599619d93938e2cd9e301","type":"artist","uuid":"9f701f30-3165-4879-9686-fa36c59c1fd8"}
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 0x1fcefe088998b4995be7aa3f701bc2d5649a01d46d691300f8d19851e3da64e3. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f701f30-3165-4879-9686-fa36c59c1fd8.json and https://artists.proofprofile.net/proofs/artist/9f701f30-3165-4879-9686-fa36c59c1fd8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
  text: {"copyright_id":"0x1fcefe088998b4995be7aa3f701bc2d5649a01d46d691300f8d19851e3da64e3","name":"Kana Matsumoto","registered_at":"2026-06-20T05:16:35Z","symbol":"NIM1522940","token_address":"0xe2ff52573e6eade4b81599619d93938e2cd9e301","type":"artist","uuid":"9f701f30-3165-4879-9686-fa36c59c1fd8"}
album: 生きているだけの価値
  type: MusicAlbum
  date published: 2012-12-07
album: 死んだように生きるのはもうやめた
  type: MusicAlbum
  date published: 2014-05-28
album: Healer
  type: MusicAlbum
  date published: 2017-04-30
album: Departure day
  type: MusicAlbum
  date published: 2017-05-23
album: Strings
  type: MusicAlbum
  date published: 2017-06-21
album: Strings
  type: MusicAlbum
  date published: 2017-06-21
album: 私の日常
  type: MusicAlbum
  date published: 2020-08-01
album: My daily life
  type: MusicAlbum
  date published: 2020-08-01
album: 暮らしの中に光る歌
  type: MusicAlbum
  date published: 2024-12-01
album: Life
  type: MusicAlbum
  date published: 2024-12-01
album: casual comfort (2008)
  type: MusicAlbum
  date published: 2025-02-01
album: casual comfort (2008)
  type: MusicAlbum
  date published: 2025-02-01
  track: 吉祥寺には君がいない
    type: MusicRecording
    duration: PT3M17S
    duration ms: 197093
    explicit: false
    by artist: Kana Matsumoto
    in album: casual comfort (2008)
      type: MusicAlbum
      date published: 2025-02-01
    isrc code: TCJPD2551178
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T16:27:01+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5dcdbec788d0e089734ca855e3a7c19b4976272e302ec44d03840992b3004987
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958911
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958911
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPD2551178
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T16:46:31Z
    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 0x5dcdbec788d0e089734ca855e3a7c19b4976272e302ec44d03840992b3004987. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/TCJPD2551178.
      date published: 2026-07-20T16:46:31Z
    audio: 吉祥寺には君がいない
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.656
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.621
      additional property: Energy
        type: PropertyValue
        value: 0.429
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.867
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.1
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.287
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.241
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major