フユウ
type: MusicGroup
genre: vocaloid
popularity: 7
followers: 305
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0d1f29f2791fa6d0db1d7031b0b3ccfb1b79eb06e96ede59549496348a3f651a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954638
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954638
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d41abb7c-9401-4961-b35c-4dac292015f9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d41abb7c-9401-4961-b35c-4dac292015f9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d41abb7c-9401-4961-b35c-4dac292015f9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T03:45:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0d1f29f2791fa6d0db1d7031b0b3ccfb1b79eb06e96ede59549496348a3f651a","name":"フユウ","registered_at":"2026-06-21T02:10:05Z","symbol":"NIM1787230","token_address":"0xe678625644cbed6ab2aea325c863ddf110182eea","type":"artist","uuid":"d41abb7c-9401-4961-b35c-4dac292015f9"}
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 0x0d1f29f2791fa6d0db1d7031b0b3ccfb1b79eb06e96ede59549496348a3f651a. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d41abb7c-9401-4961-b35c-4dac292015f9.json and https://artists.proofprofile.net/proofs/artist/d41abb7c-9401-4961-b35c-4dac292015f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T03:45:44Z
  text: {"copyright_id":"0x0d1f29f2791fa6d0db1d7031b0b3ccfb1b79eb06e96ede59549496348a3f651a","name":"フユウ","registered_at":"2026-06-21T02:10:05Z","symbol":"NIM1787230","token_address":"0xe678625644cbed6ab2aea325c863ddf110182eea","type":"artist","uuid":"d41abb7c-9401-4961-b35c-4dac292015f9"}
album: CROW CROW (feat. Musical Isotope RIME)
  type: MusicAlbum
  date published: 2023-06-14
album: クロウクロウ (feat. 音楽的同位体 裏命)
  type: MusicAlbum
  date published: 2023-06-14
album: CAPSULE
  type: MusicAlbum
  date published: 2023-09-19
album: カプセル (feat. 音楽的同位体 裏命 & 音楽的同位体 星界)
  type: MusicAlbum
  date published: 2023-09-21
album: CAPSULE (feat. Musical Isotope RIME & Musical Isotope SEKAI)
  type: MusicAlbum
  date published: 2023-09-21
album: ヘヴンリィ (feat. 音楽的同位体 裏命)
  type: MusicAlbum
  date published: 2023-12-02
album: HEAVENLY (feat. Musical Isotope RIME)
  type: MusicAlbum
  date published: 2023-12-02
album: ハッピーランド (feat. 初音ミク)
  type: MusicAlbum
  date published: 2024-05-16
album: HAPPY LAND (feat. HATSUNE MIKU)
  type: MusicAlbum
  date published: 2024-05-16
album: STAR NIGHT TRAIN (feat. HATSUNE MIKU)
  type: MusicAlbum
  date published: 2024-05-19
album: 夜光列車 (feat. 初音ミク)
  type: MusicAlbum
  date published: 2024-05-19
album: 愛の食べくらべ (feat. 初音ミク & 可不)
  type: MusicAlbum
  date published: 2024-05-31
album: FEAST OF LOVE (feat. HATSUNE MIKU & KAFU)
  type: MusicAlbum
  date published: 2024-05-31
album: NIGHTMARE ABYSS (feat. Kaai Yuki)
  type: MusicAlbum
  date published: 2025-01-24
  track: NIGHTMARE ABYSS (feat. Kaai Yuki)
    type: MusicRecording
    duration: PT2M58S
    duration ms: 178593
    explicit: false
    by artist: フユウ
    in album: NIGHTMARE ABYSS (feat. Kaai Yuki)
      type: MusicAlbum
      date published: 2025-01-24
    genre: vocaloid
    isrc code: TCJPD2559193
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T20:05:36+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd0fa0528a8e10a19cd1c8cae48f829969e67b1b73807db750c786a5ea7c67858
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956551
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956551
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPD2559193
    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 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 0xd0fa0528a8e10a19cd1c8cae48f829969e67b1b73807db750c786a5ea7c67858. 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/TCJPD2559193.
      date published: 2026-07-03T21:18:05Z
    audio: NIGHTMARE ABYSS (feat. Kaai Yuki)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 159.8
      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: 0.389
      additional property: Energy
        type: PropertyValue
        value: 0.975
      additional property: Speechiness
        type: PropertyValue
        value: 0.179
      additional property: Acousticness
        type: PropertyValue
        value: 0.031
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.018
      additional property: Liveness
        type: PropertyValue
        value: 0.317
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.543
      additional property: Loudness (dB)
        type: PropertyValue
        value: -0.864
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: ナイトメアアビス (feat. 歌愛ユキ)
  type: MusicAlbum
  date published: 2025-01-24
album: ブラッドドール
  type: MusicAlbum
  date published: 2025-07-02
album: 呪呪呪 (feat. 初音ミク & 歌愛ユキ)
  type: MusicAlbum
  date published: 2025-08-26
album: CURSE CURSE CURSE (feat. HATSUNE MIKU & Kaai Yuki)
  type: MusicAlbum
  date published: 2025-08-26
album: GUILTY (feat. HATSUNE MIKU)
  type: MusicAlbum
  date published: 2025-10-01
  track: GUILTY (feat. HATSUNE MIKU)
    type: MusicRecording
    duration: PT2M53S
    duration ms: 173632
    explicit: false
    by artist: フユウ
    in album: GUILTY (feat. HATSUNE MIKU)
      type: MusicAlbum
      date published: 2025-10-01
    genre: vocaloid
    isrc code: QT66K2503939
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T09:42:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8aab49b9c2655c7baea7dfc6724757d8718c99f23882faaf838c49e7973c0c5f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
    additional property: OTSBitcoinBlockVerifyURL
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: GUILTY (feat. HATSUNE MIKU)
album: ギルティ (feat. 初音ミク)

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 958860

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958860

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT66K2503939

OTSTimestamp
type: PropertyValue
value: 2026-07-20T09:58:28Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aab49b9c2655c7baea7dfc6724757d8718c99f23882faaf838c49e7973c0c5f. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QT66K2503939.
date published: 2026-07-20T09:58:28Z

GUILTY (feat. HATSUNE MIKU)
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 158.901
additional property: Musical Key
  type: PropertyValue
  value: 9
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.494
additional property: Energy
  type: PropertyValue
  value: 0.921
additional property: Speechiness
  type: PropertyValue
  value: 0.106
additional property: Acousticness
  type: PropertyValue
  value: 0.165
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.833
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.506
additional property: Loudness (dB)
  type: PropertyValue
  value: -4.509
additional property: Key Name
  type: PropertyValue
  value: A
additional property: Mode Name
  type: PropertyValue
  value: Minor

ギルティ (feat. 初音ミク)
type: MusicAlbum
date published: 2025-10-01