かえる目
type: MusicGroup
genre: japanese indie
popularity: 5
followers: 567
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x755b51dd005b36a0e63e207649eb30e4f3f5fab2e804d684ac9b3409ece824ef
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954593
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954593
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/be804b7a-8264-4b03-a68b-9616a53972ab.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/be804b7a-8264-4b03-a68b-9616a53972ab.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/be804b7a-8264-4b03-a68b-9616a53972ab
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:46:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x755b51dd005b36a0e63e207649eb30e4f3f5fab2e804d684ac9b3409ece824ef","name":"かえる目","registered_at":"2026-06-20T18:28:30Z","symbol":"NIM1678478","token_address":"0x97ab00d818299a4893d690a557f5fed9a4cdfd92","type":"artist","uuid":"be804b7a-8264-4b03-a68b-9616a53972ab"}
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 0x755b51dd005b36a0e63e207649eb30e4f3f5fab2e804d684ac9b3409ece824ef. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be804b7a-8264-4b03-a68b-9616a53972ab.json and https://artists.proofprofile.net/proofs/artist/be804b7a-8264-4b03-a68b-9616a53972ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:46:01Z
  text: {"copyright_id":"0x755b51dd005b36a0e63e207649eb30e4f3f5fab2e804d684ac9b3409ece824ef","name":"かえる目","registered_at":"2026-06-20T18:28:30Z","symbol":"NIM1678478","token_address":"0x97ab00d818299a4893d690a557f5fed9a4cdfd92","type":"artist","uuid":"be804b7a-8264-4b03-a68b-9616a53972ab"}
album: 主観
  type: MusicAlbum
  date published: 2007-10-10
album: 惑星
  type: MusicAlbum
  date published: 2009-03-01
album: 拝借
  type: MusicAlbum
  date published: 2011-03-24
album: 切符
  type: MusicAlbum
  date published: 2016-12-04
  track: ラーメン日和
    type: MusicRecording
    duration: PT3M35S
    duration ms: 215266
    explicit: false
    by artist: かえる目
    in album: 切符
      type: MusicAlbum
      date published: 2016-12-04
    genre: japanese indie
    isrc code: QZDA82043557
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T05:48:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa5146fcfd80dd5a90b65e9b5df84731a44d7305354ffa714247c64a540dc4c02
    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/QZDA82043557
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5146fcfd80dd5a90b65e9b5df84731a44d7305354ffa714247c64a540dc4c02. 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/QZDA82043557.
      date published: 2026-07-17T06:09:33Z
    audio: ラーメン日和
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.706
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.704
      additional property: Energy
        type: PropertyValue
        value: 0.205
      additional property: Speechiness
        type: PropertyValue
        value: 0.074
      additional property: Acousticness
        type: PropertyValue
        value: 0.918
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.014
      additional property: Liveness
        type: PropertyValue
        value: 0.12
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.458
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.967
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major