Meia Dúzia de 3 ou 4
type: MusicGroup
genre: nova mpb
popularity: 5
followers: 609
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x310415549a4dd77b71496be5f9a6d31f38c33f264454987b0d7489c636312682
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953875
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953875
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/07ad325a-e833-4fdb-9040-deeee9ee1871.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/07ad325a-e833-4fdb-9040-deeee9ee1871.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/07ad325a-e833-4fdb-9040-deeee9ee1871
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:12:46Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x310415549a4dd77b71496be5f9a6d31f38c33f264454987b0d7489c636312682","name":"Meia Dúzia de 3 ou 4","registered_at":"2026-06-15T16:16:07Z","symbol":"NIM0762695","token_address":"0xec09d659368143514f1b5c7de07603de8681938f","type":"artist","uuid":"07ad325a-e833-4fdb-9040-deeee9ee1871"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310415549a4dd77b71496be5f9a6d31f38c33f264454987b0d7489c636312682. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07ad325a-e833-4fdb-9040-deeee9ee1871.json and https://artists.proofprofile.net/proofs/artist/07ad325a-e833-4fdb-9040-deeee9ee1871.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:12:46Z
  text: {"copyright_id":"0x310415549a4dd77b71496be5f9a6d31f38c33f264454987b0d7489c636312682","name":"Meia Dúzia de 3 ou 4","registered_at":"2026-06-15T16:16:07Z","symbol":"NIM0762695","token_address":"0xec09d659368143514f1b5c7de07603de8681938f","type":"artist","uuid":"07ad325a-e833-4fdb-9040-deeee9ee1871"}
album: Tudo Se Torna
  type: MusicAlbum
  date published: 2008-11-27
album: O Fim Está Próspero - A Trilha Sonora (Oficial) do Fim do Mundo
  type: MusicAlbum
  date published: 2010
album: Tá na Hora de Dormir
  type: MusicAlbum
  date published: 2013-06-01
  track: Atrás da Janela
    type: MusicRecording
    duration: PT2M29S
    duration ms: 149706
    explicit: false
    by artist: Meia Dúzia de 3 ou 4
    in album: Tá na Hora de Dormir
      type: MusicAlbum
      date published: 2013-06-01
    genre: nova mpb
    isrc code: BRQ4Q1300001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T15:10:08+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa9e72cd23b5a951fc72d3f0156b6d2dd6a66bd17a91d278205fb317302859d71
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959024
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959024
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRQ4Q1300001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T15:31:18Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e72cd23b5a951fc72d3f0156b6d2dd6a66bd17a91d278205fb317302859d71. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BRQ4Q1300001.
      date published: 2026-07-21T15:31:18Z
    audio: Atrás da Janela
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 164.091
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.417
      additional property: Energy
        type: PropertyValue
        value: 0.132
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.949
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.096
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.403
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.967
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Tem Muito Disso Que Cê Tá Falando
  type: MusicAlbum
  date published: 2014-07-16
album: Filho de Peixe
  type: MusicAlbum
  date published: 2014-08-12
album: Canção para Deseducar Crianças em Tempos de Crise
  type: MusicAlbum
  date published: 2015-09-23
album: Tem Muito Disso e Mais um Pouco
  type: MusicAlbum
  date published: 2015-10-01
album: 81 Anos de Tom Zé
  type: MusicAlbum
  date published: 2017-12-15