城京
type: MusicGroup
genre: vocaloid
popularity: 3
followers: 144
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x26a656a76e9bc3a914710259479f1498a338c3c69724c9e3fb17c9d2095cfeab
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954553
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954553
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/abe4fdb3-a77b-4dd5-9a05-5f1f52314b1f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/abe4fdb3-a77b-4dd5-9a05-5f1f52314b1f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/abe4fdb3-a77b-4dd5-9a05-5f1f52314b1f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T11:51:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x26a656a76e9bc3a914710259479f1498a338c3c69724c9e3fb17c9d2095cfeab","name":"城京","registered_at":"2026-06-20T09:47:33Z","symbol":"NIM1583764","token_address":"0xd1a58db38cf3a3daf08cdb8dc29d54108432798f","type":"artist","uuid":"abe4fdb3-a77b-4dd5-9a05-5f1f52314b1f"}
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 0x26a656a76e9bc3a914710259479f1498a338c3c69724c9e3fb17c9d2095cfeab. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abe4fdb3-a77b-4dd5-9a05-5f1f52314b1f.json and https://artists.proofprofile.net/proofs/artist/abe4fdb3-a77b-4dd5-9a05-5f1f52314b1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T11:51:30Z
  text: {"copyright_id":"0x26a656a76e9bc3a914710259479f1498a338c3c69724c9e3fb17c9d2095cfeab","name":"城京","registered_at":"2026-06-20T09:47:33Z","symbol":"NIM1583764","token_address":"0xd1a58db38cf3a3daf08cdb8dc29d54108432798f","type":"artist","uuid":"abe4fdb3-a77b-4dd5-9a05-5f1f52314b1f"}
album: 惡夢界隈 (feat. 可不)
  type: MusicAlbum
  date published: 2022-05-25
album: カラクリシティ
  type: MusicAlbum
  date published: 2022-06-18
album: こちら足立区北千住駅前観測所
  type: MusicAlbum
  date published: 2023-12-02
album: Observatory in front of the Kitasenju Sta.
  type: MusicAlbum
  date published: 2023-12-02
  track: Observatory in front of the Kitasenju Sta.
    type: MusicRecording
    duration: PT3M19S
    duration ms: 199500
    explicit: false
    by artist: 城京
    in album: Observatory in front of the Kitasenju Sta.
      type: MusicAlbum
      date published: 2023-12-02
    genre: vocaloid
    isrc code: JPA652309739
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T07:36:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8a46681799a0e3cb9893b5f0ce48e1fd0e956df71ced55863b8937a42bb8e5d2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959114
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959114
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA652309739
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T08:41:42Z
    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 0x8a46681799a0e3cb9893b5f0ce48e1fd0e956df71ced55863b8937a42bb8e5d2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPA652309739.
      date published: 2026-07-22T08:41:42Z
    audio: Observatory in front of the Kitasenju Sta.
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 160.102
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.513
      additional property: Energy
        type: PropertyValue
        value: 0.899
      additional property: Speechiness
        type: PropertyValue
        value: 0.061
      additional property: Acousticness
        type: PropertyValue
        value: 0.004
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.115
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.781
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.176
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Junction Box
  type: MusicAlbum
  date published: 2024-06-07
album: ジャンクションボックス
  type: MusicAlbum
  date published: 2024-06-07
album: Fancy Heaven
  type: MusicAlbum
  date published: 2025-01-18
album: ファンシーヘヴン
  type: MusicAlbum
  date published: 2025-01-18
album: Polizei
  type: MusicAlbum
  date published: 2025-02-22
album: Polizei
  type: MusicAlbum
  date published: 2025-02-22