Seiko Niizuma
type: MusicGroup
genre: musicals
description: is a Japanese actress and singer. She is represented with Production Ogi. Seiko is best known for her Musical theatre lead roles in Japan in Les Misérables, Miss Saigon, and Marie Antoinette. On Tel
popularity: 26
followers: 9867
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additional property: OTSVerifyInstructions
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  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
subject of: OpenTimestamps Proof of Existence
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album: Yume no Tsubasa
  type: MusicAlbum
  date published: 2006
album: 夢の翼
  type: MusicAlbum
  date published: 2006-07-19
album: 愛をとめないで~Always Loving You~ Single
  type: MusicAlbum
  date published: 2007-10-24
album: ヴァージン・ロード
  type: MusicAlbum
  date published: 2008-01-16
album: MUSICAL MOMENTS
  type: MusicAlbum
  date published: 2008-07-16
  track: Seasons of Love (「レント」より)
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      date published: 2008-07-16
    genre: musicals
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    additional property: OTSVerifyInstructions
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      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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-17T23:18:11Z
    audio: Seasons of Love (「レント」より)
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      additional property: Tempo (BPM)
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  track: The Voice In My Heart (「マリー・アントワネット」より)
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    by artist: Seiko Niizuma
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      type: MusicAlbum
      date published: 2008-07-16
    genre: musicals
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    additional property: OTSVerifyInstructions
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      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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-18T12:44:05Z
    audio: The Voice In My Heart (「マリー・アントワネット」より)
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  track: Memory (「キャッツ」より)
album: ありがとう
album: LIVE MOMENTS
album: I Dreamed A Dream
album: SEIKO
album: この祈り〜The Prayer〜
album: 天地(あめつち)の声
album: アライブ/天地(あめつち)の声
album: Toki no Tsubasa (Movie "The Princess and the Pilot" Main Theme)
album: Ai wo Tomenai de - Always Loving You -
album: Virgin Road
album: Musical Moments
album: 世界が終わる夜のように (ミュージカル『ミス・サイゴン』より, duet with 山崎育三郎)
album: Colors of Life
album: MUSICAL MOMENTS 2
track: Horns - Game Ver.

Horns - Game Ver.
type: MusicRecording
duration: PT4M2S
duration ms: 242443
explicit: false
by artist: Seiko Niizuma
in album: MementoMori Lament Collection Vol.1 (Disc3)
  type: MusicAlbum
  date published: 2023-10-25
isrc code: JPZ922308630
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T05:09:12Z
audio: Horns - Game Ver.
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  additional property: Key Name
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Speechiness
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Acousticness
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Instrumentalness
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Liveness
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value: 0.094

Valence (Positivity)
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value: 0.269

Loudness (dB)
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value: -8.946

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Memory (「キャッツ」より)
type: MusicRecording
duration: PT4M33S
duration ms: 273733
explicit: false
by artist: Seiko Niizuma
in album: MUSICAL MOMENTS
  type: MusicAlbum
  date published: 2008-07-16
genre: musicals
isrc code: JPPC00800908
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additional property: CopyrightStatus
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df6534e2464081b93ef57a61415fca159147f8809b1d4628aa7bd69ebe7cbd1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/JPPC00800908.
  date published: 2026-07-16T20:12:32Z
audio: Memory (「キャッツ」より)
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  additional property: Tempo (BPM)
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  additional property: Valence (Positivity)
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  additional property: Key Name
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  additional property: Mode Name
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ありがとう
type: MusicAlbum
date published: 2012-05-16

LIVE MOMENTS
type: MusicAlbum
date published: 2013-08-21
track: ラ・マンチャの男(Man of La Mancha)(LIVE Version)
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  genre: musicals
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
    type: PropertyValue
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  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499e22d615c62082efee2e014cdd07ad4588a5a2c1261bbbc35867ba3ba9adc3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/JPPC01301188.
    date published: 2026-07-15T20:38:50Z
  audio: ラ・マンチャの男(Man of La Mancha)(LIVE Version)
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    additional property: Danceability
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    additional property: Acousticness
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    additional property: Instrumentalness
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track: 私だけに(Ich gehor nur mir )(LIVE Version)
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  additional property: OTSVerifyInstructions
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    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
  subject of: OpenTimestamps Proof of Existence
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OpenTimestamps Proof of Existence
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date published: 2026-07-18T22:59:44Z

命をあげよう(I'd Give My Life For You)(LIVE Version)
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I Dreamed A Dream
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I Dreamed A Dream
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SEIKO
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SEIKO
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この祈り〜The Prayer〜
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天地(あめつち)の声
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アライブ/天地(あめつち)の声
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Toki no Tsubasa (Movie "The Princess and the Pilot" Main Theme)
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Ai wo Tomenai de - Always Loving You -
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Virgin Road
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Musical Moments
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世界が終わる夜のように (ミュージカル『ミス・サイゴン』より, duet with 山崎育三郎)
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OpenTimestamps Proof of Existence
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date published: 2026-07-19T12:24:55Z

ひまわり "SUNWARD"
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MUSICAL MOMENTS 2
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MUSICAL MOMENTS 2
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