しいか
type: MusicGroup
genre: vocaloid
popularity: 6
followers: 243
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8bea428973f9db6a9b89bf2dffc7f08eff85fb950fd30190795a20aed972cf4e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/63d6536e-e2a4-4740-a230-6ef6ca40dc63.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/63d6536e-e2a4-4740-a230-6ef6ca40dc63.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/63d6536e-e2a4-4740-a230-6ef6ca40dc63
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8bea428973f9db6a9b89bf2dffc7f08eff85fb950fd30190795a20aed972cf4e","name":"しいか","registered_at":"2026-06-17T00:27:15Z","symbol":"NIM1223561","token_address":"0xa28f043e46aee79ee60e2fcbdc6241660d564536","type":"artist","uuid":"63d6536e-e2a4-4740-a230-6ef6ca40dc63"}
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 0x8bea428973f9db6a9b89bf2dffc7f08eff85fb950fd30190795a20aed972cf4e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63d6536e-e2a4-4740-a230-6ef6ca40dc63.json and https://artists.proofprofile.net/proofs/artist/63d6536e-e2a4-4740-a230-6ef6ca40dc63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x8bea428973f9db6a9b89bf2dffc7f08eff85fb950fd30190795a20aed972cf4e","name":"しいか","registered_at":"2026-06-17T00:27:15Z","symbol":"NIM1223561","token_address":"0xa28f043e46aee79ee60e2fcbdc6241660d564536","type":"artist","uuid":"63d6536e-e2a4-4740-a230-6ef6ca40dc63"}
album: メモワール (feat. 初音ミク)
  type: MusicAlbum
  date published: 2022-12-24
album: 悲愴
  type: MusicAlbum
  date published: 2023
album: またねクレセント (feat. 初音ミク)
  type: MusicAlbum
  date published: 2023-06-11
album: Anomaly de mitashite
  type: MusicAlbum
  date published: 2023-09-05
album: エト (feat. 初音ミク)
  type: MusicAlbum
  date published: 2024-10-31
album: 病的ピューバティ
  type: MusicAlbum
  date published: 2025-09-01
  track: 病的ピューバティ (feat. 初音ミク)
    type: MusicRecording
    duration: PT3M11S
    duration ms: 191403
    explicit: false
    by artist: しいか
    in album: 病的ピューバティ
      type: MusicAlbum
      date published: 2025-09-01
    genre: vocaloid
    isrc code: JP92Q2502758
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T23:49:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5b02b6e2cef0e02eaf65fc8717780d71a7300ae9a33713584f6fb3685e6926b8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958340
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958340
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2502758
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T00:53:26Z
    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 0x5b02b6e2cef0e02eaf65fc8717780d71a7300ae9a33713584f6fb3685e6926b8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JP92Q2502758.
      date published: 2026-07-17T00:53:26Z
    audio: 病的ピューバティ (feat. 初音ミク)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 178.026
      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: 0.594
      additional property: Energy
        type: PropertyValue
        value: 0.789
      additional property: Speechiness
        type: PropertyValue
        value: 0.194
      additional property: Acousticness
        type: PropertyValue
        value: 0.013
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.075
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.586
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.468
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: ナタリス
  type: MusicAlbum
  date published: 2025-09-01