せなすけ
type: MusicGroup
genre: vocaloid
popularity: 2
followers: 24
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x566626ccae0f972905536d148cdf5e8f3e40d563d81981dd0d525c2704195852
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15afd50d-0779-45ed-8f90-9221f516dbf8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15afd50d-0779-45ed-8f90-9221f516dbf8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/15afd50d-0779-45ed-8f90-9221f516dbf8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x566626ccae0f972905536d148cdf5e8f3e40d563d81981dd0d525c2704195852","name":"せなすけ","registered_at":"2026-06-15T21:20:42Z","symbol":"NIM0835346","token_address":"0x0aa56422a1de25ec494a370d7df4bc8cd0b7e913","type":"artist","uuid":"15afd50d-0779-45ed-8f90-9221f516dbf8"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566626ccae0f972905536d148cdf5e8f3e40d563d81981dd0d525c2704195852. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15afd50d-0779-45ed-8f90-9221f516dbf8.json and https://artists.proofprofile.net/proofs/artist/15afd50d-0779-45ed-8f90-9221f516dbf8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0x566626ccae0f972905536d148cdf5e8f3e40d563d81981dd0d525c2704195852","name":"せなすけ","registered_at":"2026-06-15T21:20:42Z","symbol":"NIM0835346","token_address":"0x0aa56422a1de25ec494a370d7df4bc8cd0b7e913","type":"artist","uuid":"15afd50d-0779-45ed-8f90-9221f516dbf8"}
album: every moment (2025 Remastered)
  type: MusicAlbum
  date published: 2022-05-20
album: Essence
  type: MusicAlbum
  date published: 2023-05-23
album: SENAZOIC
  type: MusicAlbum
  date published: 2024-05-11
album: SEEK
  type: MusicAlbum
  date published: 2024-06-08
album: Flashback
  type: MusicAlbum
  date published: 2024-08-07
album: ECHOES
  type: MusicAlbum
  date published: 2025-05-21
album: ECHOES (Acoustic Ver.)
  type: MusicAlbum
  date published: 2025-06-07
album: このサメ飼ってもいい？ (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-06-26
  track: このサメ飼ってもいい？ (feat. 初音ミク)
    type: MusicRecording
    duration: PT1M58S
    duration ms: 118333
    explicit: false
    by artist: せなすけ
    in album: このサメ飼ってもいい？ (feat. 初音ミク)
      type: MusicAlbum
      date published: 2025-06-26
    genre: vocaloid
    isrc code: TCJPJ2529643
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T02:20:30+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9904a77a3cb56bdb61bba3e6730f576e2c7bcfcb91946f53779672863f43b51a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958650
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958650
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPJ2529643
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T03:36:41Z
    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 0x9904a77a3cb56bdb61bba3e6730f576e2c7bcfcb91946f53779672863f43b51a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPJ2529643.
      date published: 2026-07-19T03:36:41Z
    audio: このサメ飼ってもいい？ (feat. 初音ミク)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 179.873
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.686
      additional property: Energy
        type: PropertyValue
        value: 0.858
      additional property: Speechiness
        type: PropertyValue
        value: 0.23
      additional property: Acousticness
        type: PropertyValue
        value: 0.21
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.068
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.964
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.864
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: こんなところにサメ (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-07-12
album: バナナの謎 (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-08-08
album: ミクトゥポポ (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-09-19
album: スキスキダイスキ (feat. 初音ミク)
  type: MusicAlbum
  date published: 2025-10-25
album: このサメ飼ってもいい？ (feat. 重音テト) [テトの場合]
  type: MusicAlbum
  date published: 2025-11-07