Carl Longstaff
type: MusicGroup
popularity: 2
followers: 865
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x18190a3cf31f34c2716bf68a2061e01c4638cc6ca1a265c671fef0cd84568e15
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e9924668-0fca-4bc8-9881-4351b28364d3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e9924668-0fca-4bc8-9881-4351b28364d3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e9924668-0fca-4bc8-9881-4351b28364d3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x18190a3cf31f34c2716bf68a2061e01c4638cc6ca1a265c671fef0cd84568e15","name":"Carl Longstaff","registered_at":"2026-06-21T10:09:49Z","symbol":"NIM1895013","token_address":"0xc8de45b2779acc7b7bb734226e19c4c7e76b6be7","type":"artist","uuid":"e9924668-0fca-4bc8-9881-4351b28364d3"}
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 0x18190a3cf31f34c2716bf68a2061e01c4638cc6ca1a265c671fef0cd84568e15. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9924668-0fca-4bc8-9881-4351b28364d3.json and https://artists.proofprofile.net/proofs/artist/e9924668-0fca-4bc8-9881-4351b28364d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x18190a3cf31f34c2716bf68a2061e01c4638cc6ca1a265c671fef0cd84568e15","name":"Carl Longstaff","registered_at":"2026-06-21T10:09:49Z","symbol":"NIM1895013","token_address":"0xc8de45b2779acc7b7bb734226e19c4c7e76b6be7","type":"artist","uuid":"e9924668-0fca-4bc8-9881-4351b28364d3"}
album: Divine
  type: MusicAlbum
  date published: 2021-09-24
  track: Standing All Alone
    type: MusicRecording
    duration: PT4M38S
    duration ms: 278578
    explicit: false
    by artist: Carl Longstaff
    in album: Divine
      type: MusicAlbum
      date published: 2021-09-24
    isrc code: CBAFJ2100004
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T17:59:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6168e870b10fc695e62d5cef3854de31cf243000c9c8da3afbd449398384057b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958765
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958765
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CBAFJ2100004
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T18:01:47Z
    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 0x6168e870b10fc695e62d5cef3854de31cf243000c9c8da3afbd449398384057b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CBAFJ2100004.
      date published: 2026-07-19T18:01:47Z
    audio: Standing All Alone
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 154.083
      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: 0.442
      additional property: Energy
        type: PropertyValue
        value: 0.641
      additional property: Speechiness
        type: PropertyValue
        value: 0.043
      additional property: Acousticness
        type: PropertyValue
        value: 0.116
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.137
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.464
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.4
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: We Were Made
  type: MusicAlbum
  date published: 2021-11-05
album: Inside Out
  type: MusicAlbum
  date published: 2022-09-23
album: Honesty
  type: MusicAlbum
  date published: 2023-04-22
album: Concrete Garden
  type: MusicAlbum
  date published: 2023-07-24
album: Grin and Bare It
  type: MusicAlbum
  date published: 2023-08-23
album: Yesterday
  type: MusicAlbum
  date published: 2023-09-23