イトマP
type: MusicGroup
genre: vocaloid
popularity: 8
followers: 349
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x588b3d0a527633eeeb79bbda7b53056d12d88b1e36ae9c933ef5feb4731a6b25
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3f92f4f-76a5-42b4-8f1c-57f332420598.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3f92f4f-76a5-42b4-8f1c-57f332420598.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a3f92f4f-76a5-42b4-8f1c-57f332420598
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x588b3d0a527633eeeb79bbda7b53056d12d88b1e36ae9c933ef5feb4731a6b25","name":"イトマP","registered_at":"2026-06-20T06:27:50Z","symbol":"NIM1543684","token_address":"0x5a6af2f8f13fce2fdbb90c9c61d1ecfb030e49c1","type":"artist","uuid":"a3f92f4f-76a5-42b4-8f1c-57f332420598"}
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 0x588b3d0a527633eeeb79bbda7b53056d12d88b1e36ae9c933ef5feb4731a6b25. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3f92f4f-76a5-42b4-8f1c-57f332420598.json and https://artists.proofprofile.net/proofs/artist/a3f92f4f-76a5-42b4-8f1c-57f332420598.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x588b3d0a527633eeeb79bbda7b53056d12d88b1e36ae9c933ef5feb4731a6b25","name":"イトマP","registered_at":"2026-06-20T06:27:50Z","symbol":"NIM1543684","token_address":"0x5a6af2f8f13fce2fdbb90c9c61d1ecfb030e49c1","type":"artist","uuid":"a3f92f4f-76a5-42b4-8f1c-57f332420598"}
album: ダウは陽気
  type: MusicAlbum
  date published: 2022-10-15
  track: ダウは陽気
    type: MusicRecording
    duration: PT4M52S
    duration ms: 292222
    explicit: false
    by artist: イトマP
    in album: ダウは陽気
      type: MusicAlbum
      date published: 2022-10-15
    genre: vocaloid
    isrc code: TCJPT2220528
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T18:24:07+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x001e0b3dd245815e1cf40ed2d0d540583a0ceda8915874e872a201ca8d060228
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958596
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958596
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPT2220528
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T18:42:38Z
    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 0x001e0b3dd245815e1cf40ed2d0d540583a0ceda8915874e872a201ca8d060228. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPT2220528.
      date published: 2026-07-18T18:42:38Z
    audio: ダウは陽気
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 134.997
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.782
      additional property: Energy
        type: PropertyValue
        value: 0.552
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.481
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.341
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.716
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.503
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: 一人上映
  type: MusicAlbum
  date published: 2022-10-15
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  type: MusicAlbum
  date published: 2023-05-26
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  type: MusicAlbum
  date published: 2023-11-28
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  type: MusicAlbum
  date published: 2024-01-07
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  type: MusicAlbum
  date published: 2024-01-07
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  type: MusicAlbum
  date published: 2024-01-07
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  type: MusicAlbum
  date published: 2024-01-07
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  type: MusicAlbum
  date published: 2025-03-01
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2025-03-27