David Marquez
type: MusicGroup
popularity: 3
followers: 67
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xaab159605b6a7f10c49fec4473dd1a354fc3d858f6b64a9d50a55201fe8b512a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954069
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954069
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7a322d56-af32-4256-8c9d-6179f0ce1a87.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7a322d56-af32-4256-8c9d-6179f0ce1a87.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7a322d56-af32-4256-8c9d-6179f0ce1a87
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:30:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xaab159605b6a7f10c49fec4473dd1a354fc3d858f6b64a9d50a55201fe8b512a","name":"David Marquez","registered_at":"2026-06-17T08:15:59Z","symbol":"NIM1335379","token_address":"0x210f42a1a069de8360ef8521b3e0fd53bde53500","type":"artist","uuid":"7a322d56-af32-4256-8c9d-6179f0ce1a87"}
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 0xaab159605b6a7f10c49fec4473dd1a354fc3d858f6b64a9d50a55201fe8b512a. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a322d56-af32-4256-8c9d-6179f0ce1a87.json and https://artists.proofprofile.net/proofs/artist/7a322d56-af32-4256-8c9d-6179f0ce1a87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T15:44:10Z
  text: {"copyright_id":"0xaab159605b6a7f10c49fec4473dd1a354fc3d858f6b64a9d50a55201fe8b512a","name":"David Marquez","registered_at":"2026-06-17T08:15:59Z","symbol":"NIM1335379","token_address":"0x210f42a1a069de8360ef8521b3e0fd53bde53500","type":"artist","uuid":"7a322d56-af32-4256-8c9d-6179f0ce1a87"}
album: Dreams
  type: MusicAlbum
  date published: 2019-11-08
  track: Dreams
    type: MusicRecording
    duration: PT3M23S
    duration ms: 203076
    explicit: false
    by artist: David Marquez
    in album: Dreams
      type: MusicAlbum
      date published: 2019-11-08
    isrc code: QZHN91975861
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T01:48:53+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdd1a3dc854a6bb837c321f8a8b45d640f902729654ccb649af08ef700539a537
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956776
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956776
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN91975861
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T00:28:15Z
    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 0xdd1a3dc854a6bb837c321f8a8b45d640f902729654ccb649af08ef700539a537. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:28:15Z), 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/QZHN91975861.
      date published: 2026-07-20T00:28:15Z
    audio: Dreams
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 103.997
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.643
      additional property: Energy
        type: PropertyValue
        value: 0.413
      additional property: Speechiness
        type: PropertyValue
        value: 0.025
      additional property: Acousticness
        type: PropertyValue
        value: 0.35
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.03
      additional property: Liveness
        type: PropertyValue
        value: 0.101
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.311
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.292
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: inyourpasture0001
  type: MusicAlbum
  date published: 2024-08-16
album: under the rain
  type: MusicAlbum
  date published: 2025-08-01
album: SPIRITUAL EMPHASIS
  type: MusicAlbum
  date published: 2025-10-31