八乙女うるし(CV:中村カンナ)
type: MusicGroup
popularity: 4
followers: 127
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x941f802f748e078ed24444dc0fd8493db92e5e0d3b1597c4d40f48979d09fff3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954043
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3ee0ec53-e8cd-41c9-865c-fdde42e29bdd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3ee0ec53-e8cd-41c9-865c-fdde42e29bdd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3ee0ec53-e8cd-41c9-865c-fdde42e29bdd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x941f802f748e078ed24444dc0fd8493db92e5e0d3b1597c4d40f48979d09fff3","name":"八乙女うるし(CV:中村カンナ)","registered_at":"2026-06-16T11:26:21Z","symbol":"NIM1037265","token_address":"0x944700d7b176698d1460f9647c8b07852a28abb9","type":"artist","uuid":"3ee0ec53-e8cd-41c9-865c-fdde42e29bdd"}
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 0x941f802f748e078ed24444dc0fd8493db92e5e0d3b1597c4d40f48979d09fff3. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ee0ec53-e8cd-41c9-865c-fdde42e29bdd.json and https://artists.proofprofile.net/proofs/artist/3ee0ec53-e8cd-41c9-865c-fdde42e29bdd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T04:15:20Z
  text: {"copyright_id":"0x941f802f748e078ed24444dc0fd8493db92e5e0d3b1597c4d40f48979d09fff3","name":"八乙女うるし(CV:中村カンナ)","registered_at":"2026-06-16T11:26:21Z","symbol":"NIM1037265","token_address":"0x944700d7b176698d1460f9647c8b07852a28abb9","type":"artist","uuid":"3ee0ec53-e8cd-41c9-865c-fdde42e29bdd"}
album: 50センチ
  type: MusicAlbum
  date published: 2022-07-20
  track: 50センチ
    type: MusicRecording
    duration: PT4M6S
    duration ms: 246200
    explicit: false
    by artist: 八乙女うるし(CV:中村カンナ)
    in album: 50センチ
      type: MusicAlbum
      date published: 2022-07-20
    isrc code: JPPC02210596
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0d0210f95640f13d0c52745660d8c04dcfdee64770e9cffc0424236870c3c45d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958373
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958373
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPC02210596
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T06:09:33Z
    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 0x0d0210f95640f13d0c52745660d8c04dcfdee64770e9cffc0424236870c3c45d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPPC02210596.
      date published: 2026-07-17T06:09:33Z
    audio: 50センチ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 127.977
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.762
      additional property: Energy
        type: PropertyValue
        value: 0.912
      additional property: Speechiness
        type: PropertyValue
        value: 0.056
      additional property: Acousticness
        type: PropertyValue
        value: 0.305
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.232
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.759
      additional property: Loudness (dB)
        type: PropertyValue
        value: -2.313
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major