Keiko Masuda
type: MusicGroup
genre: enka
genre: kayokyoku
description: (born on September 2, 1957, in Shizuoka, Japan) is a Japanese pop singer and actress. She is better known by her nickname Kei, and is one half of Pink Lady, the top idol group in Japan in the 1970s.
popularity: 9
followers: 933
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc215733e245fb7feaae260b5bd8670f59d4cf8110faace82d9239ce4041b7ae1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953923
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953923
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1c5595f3-3577-4ccd-8349-eef578e86378.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1c5595f3-3577-4ccd-8349-eef578e86378.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1c5595f3-3577-4ccd-8349-eef578e86378
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T09:51:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc215733e245fb7feaae260b5bd8670f59d4cf8110faace82d9239ce4041b7ae1","name":"Keiko Masuda","registered_at":"2026-06-15T23:28:16Z","symbol":"NIM0865793","token_address":"0x17793f8ca25d85856cc90b329475a69574426268","type":"artist","uuid":"1c5595f3-3577-4ccd-8349-eef578e86378"}
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 0xc215733e245fb7feaae260b5bd8670f59d4cf8110faace82d9239ce4041b7ae1. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c5595f3-3577-4ccd-8349-eef578e86378.json and https://artists.proofprofile.net/proofs/artist/1c5595f3-3577-4ccd-8349-eef578e86378.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T09:51:37Z
  text: {"copyright_id":"0xc215733e245fb7feaae260b5bd8670f59d4cf8110faace82d9239ce4041b7ae1","name":"Keiko Masuda","registered_at":"2026-06-15T23:28:16Z","symbol":"NIM0865793","token_address":"0x17793f8ca25d85856cc90b329475a69574426268","type":"artist","uuid":"1c5595f3-3577-4ccd-8349-eef578e86378"}
album: すずめ (2012 Remaster)
  type: MusicAlbum
  date published: 1981-11-28
album: ひとりが好き
  type: MusicAlbum
  date published: 1982-02-18
  track: すずめ
    type: MusicRecording
    duration: PT4M33S
    duration ms: 273760
    explicit: false
    by artist: Keiko Masuda
    in album: ひとりが好き
      type: MusicAlbum
      date published: 1982-02-18
    genre: enka
    genre: kayokyoku
    isrc code: JPWP09406550
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T22:19:24+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0dcd0adfd34ee79cb158ddb6eab5f6e647e465ad68769511c0c244b9eb41325a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958942
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958942
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP09406550
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T00:24:07Z
    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 0x0dcd0adfd34ee79cb158ddb6eab5f6e647e465ad68769511c0c244b9eb41325a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPWP09406550 — a six-check JSON result.
      date published: 2026-07-21T00:24:07Z
    audio: すずめ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 139.706
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.553
      additional property: Energy
        type: PropertyValue
        value: 0.473
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.672
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.076
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.458
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.906
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: ためらい (2012 Remaster)
  type: MusicAlbum
  date published: 1982-06-12
album: らせん階段 (2012 Remaster)
  type: MusicAlbum
  date published: 1982-10-09
album: 恋するお友達
  type: MusicAlbum
  date published: 1982-11-10
album: Colors 30th Anniversary All Time Best (Warner Music Edition)
  type: MusicAlbum
  date published: 2012-11-07
album: 愛唱歌
  type: MusicAlbum
  date published: 2014-12-10
album: 最後の恋 / 富士山だ
  type: MusicAlbum
  date published: 2018-02-21
album: Del Sole
  type: MusicAlbum
  date published: 2022-04-27
album: Et j'aime la vie
  type: MusicAlbum
  date published: 2022-05-25
album: Komorebi no Isu
  type: MusicAlbum
  date published: 2022-06-22
album: And, From Now On...
  type: MusicAlbum
  date published: 2022-07-27