Marc Crofts
type: MusicGroup
popularity: 5
followers: 128
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x907d09f1b0ca98844dfb65e5b787bc2f5f9c2f9f07effc50d721e68fba9e0caf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b1b382a8-9ec6-4096-ba2c-05d809a147a6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b1b382a8-9ec6-4096-ba2c-05d809a147a6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b1b382a8-9ec6-4096-ba2c-05d809a147a6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x907d09f1b0ca98844dfb65e5b787bc2f5f9c2f9f07effc50d721e68fba9e0caf","name":"Marc Crofts","registered_at":"2026-06-20T12:28:08Z","symbol":"NIM1612843","token_address":"0x3abbcb9de1858f32b615e14844ecc9d4dd9d4889","type":"artist","uuid":"b1b382a8-9ec6-4096-ba2c-05d809a147a6"}
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 0x907d09f1b0ca98844dfb65e5b787bc2f5f9c2f9f07effc50d721e68fba9e0caf. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1b382a8-9ec6-4096-ba2c-05d809a147a6.json and https://artists.proofprofile.net/proofs/artist/b1b382a8-9ec6-4096-ba2c-05d809a147a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x907d09f1b0ca98844dfb65e5b787bc2f5f9c2f9f07effc50d721e68fba9e0caf","name":"Marc Crofts","registered_at":"2026-06-20T12:28:08Z","symbol":"NIM1612843","token_address":"0x3abbcb9de1858f32b615e14844ecc9d4dd9d4889","type":"artist","uuid":"b1b382a8-9ec6-4096-ba2c-05d809a147a6"}
album: Carousel
  type: MusicAlbum
  date published: 2021-01-15
album: Zaza
  type: MusicAlbum
  date published: 2021-02-05
album: Nomadim
  type: MusicAlbum
  date published: 2021-03-05
  track: Our Secret Room
    type: MusicRecording
    duration: PT4M47S
    duration ms: 287013
    explicit: false
    by artist: Marc Crofts
    in album: Nomadim
      type: MusicAlbum
      date published: 2021-03-05
    isrc code: QM4TW2117375
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T21:00:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1006eaf562152e3ee304c2939a3ed4a5938ccfd1009f65127984624e7db74be5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958063
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958063
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2117375
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-14T21:07:34Z
    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 0x1006eaf562152e3ee304c2939a3ed4a5938ccfd1009f65127984624e7db74be5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM4TW2117375.
      date published: 2026-07-14T21:07:34Z
    audio: Our Secret Room
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 98.33
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.312
      additional property: Energy
        type: PropertyValue
        value: 0.252
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.846
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.623
      additional property: Liveness
        type: PropertyValue
        value: 0.111
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.153
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.878
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Gilgul - The Zurich Session
  type: MusicAlbum
  date published: 2023-09-24