Kai
type: MusicGroup
genre: vocaloid
description: Kai or KAI may refer to: Arts and entertainment Fictional entities Kai (name), includes list of fictional characters called Kai The Kai, a fictional society in the Lone Wolf gamebooks Cobra Kai, a
popularity: 41
followers: 18243
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additional property: CopyrightChainExplorerURL
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additional property: OTSCanonicalRecord
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d0bf5c02ef5d6a683897ee1696c6398c34f5d60e11ab643be5151b23757da. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c4c481c-a737-4dcf-956a-4a5e728b19a7.json and https://artists.proofprofile.net/proofs/artist/8c4c481c-a737-4dcf-956a-4a5e728b19a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
album: さよならプリンセス
  type: MusicAlbum
  date published: 2022-11-04
  track: スライム・ポップ・プライム
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    duration: PT2M11S
    duration ms: 131250
    explicit: false
    by artist: Kai
    in album: さよならプリンセス
      type: MusicAlbum
      date published: 2022-11-04
    genre: vocaloid
    isrc code: JPA652206054
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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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8779de973243310ab0ebfff891f340f7c6aba0262d2c6bcb35f2ea56b0c19aa. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPA652206054.
      date published: 2026-07-17T21:28:36Z
    audio: スライム・ポップ・プライム
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 171.051
      additional property: Musical Key
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        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.683
      additional property: Energy
        type: PropertyValue
        value: 0.754
      additional property: Speechiness
        type: PropertyValue
        value: 0.053
      additional property: Acousticness
        type: PropertyValue
        value: 0.044
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.092
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.924
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.153
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: 海底電光
    type: MusicRecording
    duration: PT2M35S
    duration ms: 155692
    explicit: false
    by artist: Kai
    in album: さよならプリンセス
      type: MusicAlbum
      date published: 2022-11-04
    genre: vocaloid
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T01:01:38Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94910e50c7a0d37d95c9f61f9b07216b0fe2fef9b21564a679de1d9d9f5d3b9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPA652206055.
      date published: 2026-07-03T01:01:38Z
    audio: 海底電光
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 166.899
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.676
      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
        value: 0.121
      additional property: Acousticness
        type: PropertyValue
        value: 0.153
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.478
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.86
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: ユニコーンガール
album: 季節の頬とワンダーランド
album: キューピット
album: Cupid
album: Laplace's Chocolat
album: ラプラスショコラ
album: カグヤ
album: kaguya
album: ピタゴラス・ウィッチ
album: Pythagoras Witch
album: マジカホリック
album: MagicaHolic

Loudness (dB)
type: PropertyValue
value: -9.951

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major

さよならプリンセス
type: MusicAlbum
date published: 2022-11-04

ユニコーンガール
type: MusicAlbum
date published: 2022-12-14

ユニコーンガール
type: MusicAlbum
date published: 2022-12-14

季節の頬とワンダーランド
type: MusicAlbum
date published: 2023-04-20

キューピット
type: MusicAlbum
date published: 2023-09-11

Cupid
type: MusicAlbum
date published: 2023-09-11

Laplace's Chocolat
type: MusicAlbum
date published: 2024-02-14

ラプラスショコラ
type: MusicAlbum
date published: 2024-02-14

カグヤ
type: MusicAlbum
date published: 2024-06-01

kaguya
type: MusicAlbum
date published: 2024-06-01
track: kaguya
  type: MusicRecording
  duration: PT2M8S
  duration ms: 128274
  explicit: false
  by artist: Kai
  in album: kaguya
    type: MusicAlbum
    date published: 2024-06-01
  genre: vocaloid
  isrc code: JPR502407643
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  additional property: OTSBitcoinBlockVerifyURL
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    value: https://blockstream.info/api/block-height/956551
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPR502407643
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T21:18:05Z
  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 0x66b0ddb5e9ba3a66eb23b10c7975c1f2f0e77d355ccc29945eb205e0203d934f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPR502407643.
    date published: 2026-07-03T21:18:05Z
  audio: kaguya
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 182.054
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.581
    additional property: Energy
      type: PropertyValue
      value: 0.683
    additional property: Speechiness
      type: PropertyValue
      value: 0.059
    additional property: Acousticness
      type: PropertyValue
      value: 0.16
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.057
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.96
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.91
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Minor

ピタゴラス・ウィッチ
type: MusicAlbum
date published: 2025-03-03

Pythagoras Witch
type: MusicAlbum
date published: 2025-03-03

マジカホリック
type: MusicAlbum
date published: 2025-06-14

MagicaHolic
type: MusicAlbum
date published: 2025-06-14