Roberto Luçardo
type: MusicGroup
popularity: 8
followers: 2257
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6b4c8376e959f4753f301c308b535395432491b73c73db202e5abfef0655f7bd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953871
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953871
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06e62d78-286a-4046-9ef7-ae72de0a8e92.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06e62d78-286a-4046-9ef7-ae72de0a8e92.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/06e62d78-286a-4046-9ef7-ae72de0a8e92
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:46:03Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6b4c8376e959f4753f301c308b535395432491b73c73db202e5abfef0655f7bd","name":"Roberto Luçardo","registered_at":"2026-06-15T15:55:40Z","symbol":"NIM0757819","token_address":"0x6d98f613bb81c301f17230c616e4836e8686966c","type":"artist","uuid":"06e62d78-286a-4046-9ef7-ae72de0a8e92"}
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 0x6b4c8376e959f4753f301c308b535395432491b73c73db202e5abfef0655f7bd. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06e62d78-286a-4046-9ef7-ae72de0a8e92.json and https://artists.proofprofile.net/proofs/artist/06e62d78-286a-4046-9ef7-ae72de0a8e92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T01:46:03Z
  text: {"copyright_id":"0x6b4c8376e959f4753f301c308b535395432491b73c73db202e5abfef0655f7bd","name":"Roberto Luçardo","registered_at":"2026-06-15T15:55:40Z","symbol":"NIM0757819","token_address":"0x6d98f613bb81c301f17230c616e4836e8686966c","type":"artist","uuid":"06e62d78-286a-4046-9ef7-ae72de0a8e92"}
album: João Fontoura por Roberto Luçardo
  type: MusicAlbum
  date published: 2000-02-02
album: De Terra, Campo e Galpão
  type: MusicAlbum
  date published: 2000-09-05
  track: Cruzada
    type: MusicRecording
    duration: PT4M54S
    duration ms: 294240
    explicit: false
    by artist: Roberto Luçardo
    in album: De Terra, Campo e Galpão
      type: MusicAlbum
      date published: 2000-09-05
    isrc code: BROCF1000665
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-02T20:49:44+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf1a8eb3b73fbc7df3e429bb513487c15f23cda44252940a7bdf2a1f89a25b834
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956396
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956396
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROCF1000665
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-02T21:01:51Z
    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 0xf1a8eb3b73fbc7df3e429bb513487c15f23cda44252940a7bdf2a1f89a25b834. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BROCF1000665.
      date published: 2026-07-02T21:01:51Z
    audio: Cruzada
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.801
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.766
      additional property: Energy
        type: PropertyValue
        value: 0.629
      additional property: Speechiness
        type: PropertyValue
        value: 0.058
      additional property: Acousticness
        type: PropertyValue
        value: 0.728
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.262
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.758
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.293
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Tarca
  type: MusicAlbum
  date published: 2003-06-06