Cardboard Kids
type: MusicGroup
popularity: 6
followers: 1595
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x299b7c48c5f4afc1ee8c42ce6ab1a74631bdd8a0f2b72593e535d4d695fd2d0e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/519fa33a-32ce-4b80-9e30-8d1bc73df33c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/519fa33a-32ce-4b80-9e30-8d1bc73df33c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/519fa33a-32ce-4b80-9e30-8d1bc73df33c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x299b7c48c5f4afc1ee8c42ce6ab1a74631bdd8a0f2b72593e535d4d695fd2d0e","name":"Cardboard Kids","registered_at":"2026-06-16T18:07:50Z","symbol":"NIM1133038","token_address":"0x839cc4fbb556843ac0039ad73d3d8316af44053e","type":"artist","uuid":"519fa33a-32ce-4b80-9e30-8d1bc73df33c"}
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 0x299b7c48c5f4afc1ee8c42ce6ab1a74631bdd8a0f2b72593e535d4d695fd2d0e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/519fa33a-32ce-4b80-9e30-8d1bc73df33c.json and https://artists.proofprofile.net/proofs/artist/519fa33a-32ce-4b80-9e30-8d1bc73df33c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x299b7c48c5f4afc1ee8c42ce6ab1a74631bdd8a0f2b72593e535d4d695fd2d0e","name":"Cardboard Kids","registered_at":"2026-06-16T18:07:50Z","symbol":"NIM1133038","token_address":"0x839cc4fbb556843ac0039ad73d3d8316af44053e","type":"artist","uuid":"519fa33a-32ce-4b80-9e30-8d1bc73df33c"}
album: What's the Catch
  type: MusicAlbum
  date published: 2014-04-19
album: Echo Boomer
  type: MusicAlbum
  date published: 2014-05-20
  track: Echo Boomer
    type: MusicRecording
    duration: PT2M33S
    duration ms: 153021
    explicit: false
    by artist: Cardboard Kids
    in album: Echo Boomer
      type: MusicAlbum
      date published: 2014-05-20
    isrc code: USCGJ1468264
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T18:24:19+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xec7a4c40adaa8b8bc0dd64fc9742fed61dbe6bc8c9d68eda33f909d5bf2e8f18
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956738
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956738
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1468264
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T04:47:21Z
    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 0xec7a4c40adaa8b8bc0dd64fc9742fed61dbe6bc8c9d68eda33f909d5bf2e8f18. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGJ1468264.
      date published: 2026-07-05T04:47:21Z
    audio: Echo Boomer
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.068
      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: 0.571
      additional property: Energy
        type: PropertyValue
        value: 0.662
      additional property: Speechiness
        type: PropertyValue
        value: 0.065
      additional property: Acousticness
        type: PropertyValue
        value: 0.235
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.481
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.5
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.462
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Vibe
  type: MusicAlbum
  date published: 2015-09-04
album: High
  type: MusicAlbum
  date published: 2015-10-23
album: Struggle
  type: MusicAlbum
  date published: 2016-06-10
album: Social
  type: MusicAlbum
  date published: 2016-06-24
album: Mint
  type: MusicAlbum
  date published: 2016-07-15
album: Mint
  type: MusicAlbum
  date published: 2020-12-23
album: High
  type: MusicAlbum
  date published: 2020-12-23