堂島孝孔
type: MusicGroup
genre: vocaloid
popularity: 5
followers: 78
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1bcc41bb6b8e3bff9b5b9cf718865fed0b51d75fe0f45fde7c35505b5fc7fa0a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9c86280-7550-4377-8aee-e30cc4089885.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9c86280-7550-4377-8aee-e30cc4089885.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b9c86280-7550-4377-8aee-e30cc4089885
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1bcc41bb6b8e3bff9b5b9cf718865fed0b51d75fe0f45fde7c35505b5fc7fa0a","name":"堂島孝孔","registered_at":"2026-06-20T16:12:11Z","symbol":"NIM1651423","token_address":"0x9bdd510943ec4bc4331cedc7d2758046374fda8c","type":"artist","uuid":"b9c86280-7550-4377-8aee-e30cc4089885"}
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 0x1bcc41bb6b8e3bff9b5b9cf718865fed0b51d75fe0f45fde7c35505b5fc7fa0a. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9c86280-7550-4377-8aee-e30cc4089885.json and https://artists.proofprofile.net/proofs/artist/b9c86280-7550-4377-8aee-e30cc4089885.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0x1bcc41bb6b8e3bff9b5b9cf718865fed0b51d75fe0f45fde7c35505b5fc7fa0a","name":"堂島孝孔","registered_at":"2026-06-20T16:12:11Z","symbol":"NIM1651423","token_address":"0x9bdd510943ec4bc4331cedc7d2758046374fda8c","type":"artist","uuid":"b9c86280-7550-4377-8aee-e30cc4089885"}
album: テトリス feat. 重音テト
  type: MusicAlbum
  date published: 2024-02-19
  track: テトリス feat. 重音テト
    type: MusicRecording
    duration: PT2M1S
    duration ms: 121200
    explicit: false
    by artist: 堂島孝孔
    in album: テトリス feat. 重音テト
      type: MusicAlbum
      date published: 2024-02-19
    genre: vocaloid
    isrc code: JPW462402448
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-13T14:22:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0daa8e6b1f2c4e71977820dc3cb596d9f7644140c728293a4a86824751ed85ee
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957863
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957863
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462402448
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-13T14:41:15Z
    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 0x0daa8e6b1f2c4e71977820dc3cb596d9f7644140c728293a4a86824751ed85ee. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPW462402448.
      date published: 2026-07-13T14:41:15Z
    audio: テトリス feat. 重音テト
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 200.075
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.567
      additional property: Energy
        type: PropertyValue
        value: 0.89
      additional property: Speechiness
        type: PropertyValue
        value: 0.135
      additional property: Acousticness
        type: PropertyValue
        value: 0.022
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.088
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.806
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.385
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: スーパースターになりたくない feat. 初音ミク
  type: MusicAlbum
  date published: 2024-02-19
album: カビっぽい feat. 初音ミク
  type: MusicAlbum
  date published: 2024-02-19
album: 成長 feat. 初音ミク
  type: MusicAlbum
  date published: 2024-02-26
album: 妄想 feat. 初音ミク
  type: MusicAlbum
  date published: 2024-04-08
album: 問題無 feat. 初音ミク
  type: MusicAlbum
  date published: 2024-04-09