Fran Márquez
type: MusicGroup
genre: calypso
popularity: 15
followers: 137
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9623f7ce87ebccd6c5858880ad9f2c7b9de00c377a423cbb939ae046b3db52b6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953596
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953596
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a76534d-1370-407c-9182-86e1d68fde3b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a76534d-1370-407c-9182-86e1d68fde3b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0a76534d-1370-407c-9182-86e1d68fde3b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T06:21:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9623f7ce87ebccd6c5858880ad9f2c7b9de00c377a423cbb939ae046b3db52b6","name":"Fran Márquez","registered_at":"2026-06-14T05:34:21Z","symbol":"NIM0354274","token_address":"0xd5a5b77765b35e0bc0ca8b865f8dd06192233db6","type":"artist","uuid":"0a76534d-1370-407c-9182-86e1d68fde3b"}
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 0x9623f7ce87ebccd6c5858880ad9f2c7b9de00c377a423cbb939ae046b3db52b6. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a76534d-1370-407c-9182-86e1d68fde3b.json and https://artists.proofprofile.net/proofs/artist/0a76534d-1370-407c-9182-86e1d68fde3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T06:21:39Z
  text: {"copyright_id":"0x9623f7ce87ebccd6c5858880ad9f2c7b9de00c377a423cbb939ae046b3db52b6","name":"Fran Márquez","registered_at":"2026-06-14T05:34:21Z","symbol":"NIM0354274","token_address":"0xd5a5b77765b35e0bc0ca8b865f8dd06192233db6","type":"artist","uuid":"0a76534d-1370-407c-9182-86e1d68fde3b"}
album: Vivir Improvisando
  type: MusicAlbum
  date published: 2024-09-13
album: Candela
  type: MusicAlbum
  date published: 2025-06-19
album: Candela
  type: MusicAlbum
  date published: 2025-06-19
album: Candela
  type: MusicAlbum
  date published: 2025-06-19
  track: Candela
    type: MusicRecording
    duration: PT3M19S
    duration ms: 199603
    explicit: false
    by artist: Fran Márquez
    in album: Candela
      type: MusicAlbum
      date published: 2025-06-19
    genre: calypso
    isrc code: QZTB32549951
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T02:11:10+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x895e5bf264d49c1807ee704b3f1381ad1f98f6e449dcb8100062fe7d8983ebe9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958484
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958484
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB32549951
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T03:34:53Z
    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 0x895e5bf264d49c1807ee704b3f1381ad1f98f6e449dcb8100062fe7d8983ebe9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTB32549951.
      date published: 2026-07-18T03:34:53Z
    audio: Candela
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 195.867
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.627
      additional property: Energy
        type: PropertyValue
        value: 0.761
      additional property: Speechiness
        type: PropertyValue
        value: 0.327
      additional property: Acousticness
        type: PropertyValue
        value: 0.152
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.163
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.901
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.671
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major