Book Cafe
type: MusicGroup
popularity: 7
followers: 17
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x03e27d8b36cc16804d2f6227c05f8dcfdb1f5e561de3edcaf8d0bc0c078cca26
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/29a89c1d-660c-4039-86f3-6a26ebbc0e6c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/29a89c1d-660c-4039-86f3-6a26ebbc0e6c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/29a89c1d-660c-4039-86f3-6a26ebbc0e6c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x03e27d8b36cc16804d2f6227c05f8dcfdb1f5e561de3edcaf8d0bc0c078cca26","name":"Book Cafe","registered_at":"2026-06-16T04:02:07Z","symbol":"NIM0931197","token_address":"0x6844d6379f69198a15ba31a0982b4a72671612c6","type":"artist","uuid":"29a89c1d-660c-4039-86f3-6a26ebbc0e6c"}
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 0x03e27d8b36cc16804d2f6227c05f8dcfdb1f5e561de3edcaf8d0bc0c078cca26. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29a89c1d-660c-4039-86f3-6a26ebbc0e6c.json and https://artists.proofprofile.net/proofs/artist/29a89c1d-660c-4039-86f3-6a26ebbc0e6c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T22:46:20Z
  text: {"copyright_id":"0x03e27d8b36cc16804d2f6227c05f8dcfdb1f5e561de3edcaf8d0bc0c078cca26","name":"Book Cafe","registered_at":"2026-06-16T04:02:07Z","symbol":"NIM0931197","token_address":"0x6844d6379f69198a15ba31a0982b4a72671612c6","type":"artist","uuid":"29a89c1d-660c-4039-86f3-6a26ebbc0e6c"}
album: Joyful Reading
  type: MusicAlbum
  date published: 2018-07-18
album: Rainy Cafe
  type: MusicAlbum
  date published: 2018-08-29
  track: Waiting for You
    type: MusicRecording
    duration: PT1M30S
    duration ms: 90541
    explicit: false
    by artist: Book Cafe
    in album: Rainy Cafe
      type: MusicAlbum
      date published: 2018-08-29
    isrc code: KRB920016257
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T01:12:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0e3bd8461cabe0bf36b22a26dacc38b2178d6bee8cb97653fde8a8ad5b5e4c8b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRB920016257
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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 0x0e3bd8461cabe0bf36b22a26dacc38b2178d6bee8cb97653fde8a8ad5b5e4c8b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRB920016257.
      date published: 2026-07-06T01:25:57Z
    audio: Waiting for You
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 66.988
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.281
      additional property: Energy
        type: PropertyValue
        value: 0.03
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0.993
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.926
      additional property: Liveness
        type: PropertyValue
        value: 0.095
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.065
      additional property: Loudness (dB)
        type: PropertyValue
        value: -35.497
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Study Cafe
  type: MusicAlbum
  date published: 2018-09-05