うらたぬき
type: MusicGroup
genre: vocaloid
popularity: 21
followers: 7417
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa88ce7448bd9dc9a44576e4f3ecd7989c69c1105a98a42e03aa05a3a403e73c6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dc23808c-46b1-431d-9d08-6f1475b3ce9d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dc23808c-46b1-431d-9d08-6f1475b3ce9d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dc23808c-46b1-431d-9d08-6f1475b3ce9d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa88ce7448bd9dc9a44576e4f3ecd7989c69c1105a98a42e03aa05a3a403e73c6","name":"うらたぬき","registered_at":"2026-06-12T11:30:09Z","symbol":"NIM0284395","token_address":"0x7250c2ab40d645c1cf0e30e4156ab740bb4e6d42","type":"artist","uuid":"dc23808c-46b1-431d-9d08-6f1475b3ce9d"}
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 0xa88ce7448bd9dc9a44576e4f3ecd7989c69c1105a98a42e03aa05a3a403e73c6. 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/dc23808c-46b1-431d-9d08-6f1475b3ce9d.json and https://artists.proofprofile.net/proofs/artist/dc23808c-46b1-431d-9d08-6f1475b3ce9d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xa88ce7448bd9dc9a44576e4f3ecd7989c69c1105a98a42e03aa05a3a403e73c6","name":"うらたぬき","registered_at":"2026-06-12T11:30:09Z","symbol":"NIM0284395","token_address":"0x7250c2ab40d645c1cf0e30e4156ab740bb4e6d42","type":"artist","uuid":"dc23808c-46b1-431d-9d08-6f1475b3ce9d"}
album: Koi no MAGIC
  type: MusicAlbum
  date published: 2021-08-09
album: SWEETS DATE
  type: MusicAlbum
  date published: 2021-08-09
album: SWEETS DATE
  type: MusicAlbum
  date published: 2021-08-09
album: 恋のMAGIC
  type: MusicAlbum
  date published: 2021-08-09
album: OHAYO
  type: MusicAlbum
  date published: 2021-11-24
album: OHAYO
  type: MusicAlbum
  date published: 2021-11-24
album: OHAYO
  type: MusicAlbum
  date published: 2021-11-24
album: うらたぬき 歌ってみた②
  type: MusicAlbum
  date published: 2022-07-27
  track: 自堕楽 - Cover
    type: MusicRecording
    duration: PT2M35S
    duration ms: 155101
    explicit: false
    by artist: うらたぬき
    in album: うらたぬき 歌ってみた②
      type: MusicAlbum
      date published: 2022-07-27
    genre: vocaloid
    isrc code: JPPC02012255
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T12:01:51+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1725f6fde9251fd0a54f4567769c19cd923bb30be55589520e1df5bf8fcbd6fd
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958876
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958876
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPC02012255
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T12:15:48Z
    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 0x1725f6fde9251fd0a54f4567769c19cd923bb30be55589520e1df5bf8fcbd6fd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPPC02012255.
      date published: 2026-07-20T12:15:48Z
    audio: 自堕楽 - Cover
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 90.093
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.581
      additional property: Energy
        type: PropertyValue
        value: 0.664
      additional property: Speechiness
        type: PropertyValue
        value: 0.062
      additional property: Acousticness
        type: PropertyValue
        value: 0.126
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.047
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.793
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.584
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major