Risa Tachibana
type: MusicGroup
genre: city pop
genre: kayokyoku
description: (born October 19, 1971) is a former Japanese idol. She is featured in the video game Risa no Yōsei Densetsu. Filmography Film Year Role NoteMaido osawagase shimasu 3 1987 Haruka Utsumi Don-matsugo
popularity: 7
followers: 2340
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954046
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/40b3a377-9a86-4204-95ed-5ea07d4ca8fe.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/40b3a377-9a86-4204-95ed-5ea07d4ca8fe.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/40b3a377-9a86-4204-95ed-5ea07d4ca8fe
additional property: OTSTimestamp
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  value: 2026-06-17T04:53:03Z
additional property: OTSCanonicalRecord
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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 → 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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5663437df83a7f282e8faa1015e74c601171e10f44759bd5f38635711b768f. Chain 2 (Bitcoin): anchored in block 954046 (2026-06-17T04:53:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40b3a377-9a86-4204-95ed-5ea07d4ca8fe.json and https://artists.proofprofile.net/proofs/artist/40b3a377-9a86-4204-95ed-5ea07d4ca8fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T04:53:03Z
  text: {"copyright_id":"0xca5663437df83a7f282e8faa1015e74c601171e10f44759bd5f38635711b768f","name":"Risa Tachibana","registered_at":"2026-06-16T12:11:01Z","symbol":"NIM1047913","token_address":"0xf9db4cc30a5477ef8811ff22b952bb975e4b21e4","type":"artist","uuid":"40b3a377-9a86-4204-95ed-5ea07d4ca8fe"}
album: 15才神話
  type: MusicAlbum
  date published: 1987-08-05
  track: 疑問
    type: MusicRecording
    duration: PT3M42S
    duration ms: 222826
    explicit: false
    by artist: Risa Tachibana
    in album: 15才神話
      type: MusicAlbum
      date published: 1987-08-05
    genre: city pop
    genre: kayokyoku
    isrc code: JPTO08722820
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    additional property: CopyrightStatus
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    additional property: OTSVerificationAPI
      type: PropertyValue
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:03:40Z
    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 0x7f965102f554cd9ab5a1b0ee7a4c95b8538ba3c9caffb9d602bead551a25d61f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPTO08722820.
      date published: 2026-07-21T03:03:40Z
    audio: 疑問
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 77.44
      additional property: Musical Key
        type: PropertyValue
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      additional property: Mode (Major/Minor)
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        value: 0
      additional property: Time Signature
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        value: 4
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
        type: PropertyValue
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      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.378
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.786
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.835
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: 初恋神話（ファースト・ラヴ）
  type: MusicAlbum
  date published: 1987-12-16
album: 理佐発見
  type: MusicAlbum
  date published: 1988-05-25
album: Wooh
  type: MusicAlbum
  date published: 1988-12-16
album: ゴールデン☆ベスト 立花理佐
  type: MusicAlbum
  date published: 2003-03-19
track: 刹那主義
  type: MusicRecording
  duration: PT4M15S
  duration ms: 255493
  explicit: false
  by artist: Risa Tachibana
  in album: City Pop Essentials - Idols -
    type: MusicAlbum
    date published: 2023-07-12
  isrc code: JPTO08831100
  additional property: CopyrightID
  additional property: CopyrightStatus
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    value: registered
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    value: 2026-07-30T14:50:30+00:00
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    value: https://explorer.copyrightchains.com/tx/0xa2cc13a11fa30d0afe0e9f77acf7ea731f41128ce62b3df497055cb6ee8aae17
  additional property: OTSHash
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    value: 960273
  additional property: OTSBitcoinBlockVerifyURL
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    value: https://blockstream.info/api/block-height/960273
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPTO08831100
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T15:42:38Z
  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 0xa2cc13a11fa30d0afe0e9f77acf7ea731f41128ce62b3df497055cb6ee8aae17. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPTO08831100.
    date published: 2026-07-30T15:42:38Z
  audio: 刹那主義
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 154.611
    additional property: Musical Key
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      value: 7
    additional property: Mode (Major/Minor)
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      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.639
    additional property: Energy
      type: PropertyValue
      value: 0.666
    additional property: Speechiness
    additional property: Acousticness
    additional property: Instrumentalness
    additional property: Liveness
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name

Speechiness
type: PropertyValue
value: 0.039

Acousticness
type: PropertyValue
value: 0.375

Instrumentalness
type: PropertyValue
value: 0

Liveness
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value: 0.037

Valence (Positivity)
type: PropertyValue
value: 0.743

Loudness (dB)
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value: -14.011

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Minor