my letter
type: MusicGroup
genre: japanese indie
genre: j-rock
genre: math rock
genre: midwest emo
popularity: 4
followers: 972
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1aedff2383b5a21ac7070ec05b05119d6dd96d6c88d4bf34ec6c662f2c53b9f1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953909
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953909
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c856c9d-faf0-4eaf-bea8-88120fc3ef5d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0c856c9d-faf0-4eaf-bea8-88120fc3ef5d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0c856c9d-faf0-4eaf-bea8-88120fc3ef5d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:53:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1aedff2383b5a21ac7070ec05b05119d6dd96d6c88d4bf34ec6c662f2c53b9f1","name":"my letter","registered_at":"2026-06-15T17:53:17Z","symbol":"NIM0785894","token_address":"0xb1ed80915f5a6ecd423bcfa9200f10fc32eb43a5","type":"artist","uuid":"0c856c9d-faf0-4eaf-bea8-88120fc3ef5d"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aedff2383b5a21ac7070ec05b05119d6dd96d6c88d4bf34ec6c662f2c53b9f1. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c856c9d-faf0-4eaf-bea8-88120fc3ef5d.json and https://artists.proofprofile.net/proofs/artist/0c856c9d-faf0-4eaf-bea8-88120fc3ef5d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x1aedff2383b5a21ac7070ec05b05119d6dd96d6c88d4bf34ec6c662f2c53b9f1","name":"my letter","registered_at":"2026-06-15T17:53:17Z","symbol":"NIM0785894","token_address":"0xb1ed80915f5a6ecd423bcfa9200f10fc32eb43a5","type":"artist","uuid":"0c856c9d-faf0-4eaf-bea8-88120fc3ef5d"}
album: My Letter
  type: MusicAlbum
  date published: 2014-12-03
album: my letter
  type: MusicAlbum
  date published: 2014-12-03
album: my letter
  type: MusicAlbum
  date published: 2014-12-03
album: 僕のミュージックマシーン
  type: MusicAlbum
  date published: 2017-04-05
  track: エスケープ
    type: MusicRecording
    duration: PT3M32S
    duration ms: 212827
    explicit: false
    by artist: my letter
    in album: 僕のミュージックマシーン
      type: MusicAlbum
      date published: 2017-04-05
    genre: japanese indie
    genre: j-rock
    genre: math rock
    genre: midwest emo
    isrc code: JPE831700015
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T18:41:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0cdb0853311f39c2e1fc998abf296f0a6033368305a91a1b2ae4d42781f03cfd
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958770
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958770
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPE831700015
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T21:45:30Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdb0853311f39c2e1fc998abf296f0a6033368305a91a1b2ae4d42781f03cfd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:45:30Z), 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/JPE831700015.
      date published: 2026-07-19T21:45:30Z
    audio: エスケープ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 177.172
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.316
      additional property: Energy
        type: PropertyValue
        value: 0.903
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.051
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.055
      additional property: Liveness
        type: PropertyValue
        value: 0.477
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.391
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.773
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major