Quarteto Fronteira
type: MusicGroup
popularity: 16
followers: 200
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfc168dcbe38ae395f37383d1f68232137a673238758a8518a836bc85494f5946
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953704
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953704
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/78b88d7c-fd4e-429b-b2a6-1af13ee73e11.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/78b88d7c-fd4e-429b-b2a6-1af13ee73e11.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/78b88d7c-fd4e-429b-b2a6-1af13ee73e11
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T22:58:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfc168dcbe38ae395f37383d1f68232137a673238758a8518a836bc85494f5946","name":"Quarteto Fronteira","registered_at":"2026-06-14T17:10:41Z","symbol":"NIM0520370","token_address":"0x5bed10617e1c80a301a39db16b14810c66080412","type":"artist","uuid":"78b88d7c-fd4e-429b-b2a6-1af13ee73e11"}
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 0xfc168dcbe38ae395f37383d1f68232137a673238758a8518a836bc85494f5946. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78b88d7c-fd4e-429b-b2a6-1af13ee73e11.json and https://artists.proofprofile.net/proofs/artist/78b88d7c-fd4e-429b-b2a6-1af13ee73e11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:58:38Z
  text: {"copyright_id":"0xfc168dcbe38ae395f37383d1f68232137a673238758a8518a836bc85494f5946","name":"Quarteto Fronteira","registered_at":"2026-06-14T17:10:41Z","symbol":"NIM0520370","token_address":"0x5bed10617e1c80a301a39db16b14810c66080412","type":"artist","uuid":"78b88d7c-fd4e-429b-b2a6-1af13ee73e11"}
album: China e Carreira
  type: MusicAlbum
  date published: 2023-09-20
album: China e carreira
  type: MusicAlbum
  date published: 2023-09-20
  track: China e carreira
    type: MusicRecording
    duration: PT3M4S
    duration ms: 184578
    explicit: false
    by artist: Quarteto Fronteira
    in album: China e carreira
      type: MusicAlbum
      date published: 2023-09-20
    isrc code: QZTBA2383196
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T04:20:06+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xae51160901c66843739dd9e961f74e8dc7e04bd52a3c42ff97ce7083d391b771
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958965
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958965
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBA2383196
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T04:29:05Z
    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 0xae51160901c66843739dd9e961f74e8dc7e04bd52a3c42ff97ce7083d391b771. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTBA2383196.
      date published: 2026-07-21T04:29:05Z
    audio: China e carreira
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 176.042
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.727
      additional property: Energy
        type: PropertyValue
        value: 0.903
      additional property: Speechiness
        type: PropertyValue
        value: 0.141
      additional property: Acousticness
        type: PropertyValue
        value: 0.544
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.062
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.841
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.139
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Paloma Blanca
  type: MusicAlbum
  date published: 2024-05-24
album: Vaneira feita a machado
  type: MusicAlbum
  date published: 2025-02-20
album: Teus olhos
  type: MusicAlbum
  date published: 2025-03-31
album: Saudade da morena
  type: MusicAlbum
  date published: 2025-07-11
album: Fernet com coca
  type: MusicAlbum
  date published: 2025-09-14
album: Cumbia de Fronteira
  type: MusicAlbum
  date published: 2025-10-12
album: TALVEZ
  type: MusicAlbum
  date published: 2025-11-14