Juca
type: MusicGroup
genre: mpb
genre: nova mpb
description: Júlio Cernadas Pereira (13 January 1929 – 11 October 2007), commonly known as Juca, was a Portuguese football midfielder and coach. Most of his career was associated with Sporting CP, as both player a
popularity: 6
followers: 1327
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1701fe9a6a413f986fbe6321e0cacf16d5526f4b04f2aa50a2d0de1d12f2bfc5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954058
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/452be1b2-a40d-4fa8-b10d-dd2198d95171.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/452be1b2-a40d-4fa8-b10d-dd2198d95171.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/452be1b2-a40d-4fa8-b10d-dd2198d95171
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T06:34:31Z
additional property: OTSCanonicalRecord
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 0x1701fe9a6a413f986fbe6321e0cacf16d5526f4b04f2aa50a2d0de1d12f2bfc5. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/452be1b2-a40d-4fa8-b10d-dd2198d95171.json and https://artists.proofprofile.net/proofs/artist/452be1b2-a40d-4fa8-b10d-dd2198d95171.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T06:34:31Z
album: Pode Vir
  type: MusicAlbum
  date published: 2015-02-02
album: Pode Vir
  type: MusicAlbum
  date published: 2015-02-02
album: Começar de Novo
  type: MusicAlbum
  date published: 2019-10-09
album: Começar de Novo
  type: MusicAlbum
  date published: 2019-10-09
  track: Começar de Novo
    type: MusicRecording
    duration: PT3M17S
    duration ms: 197125
    explicit: false
    by artist: Juca
    in album: Começar de Novo
      type: MusicAlbum
      date published: 2019-10-09
    genre: mpb
    genre: nova mpb
    isrc code: BR3751900200
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T23:34:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd4877d0a4e6f6112b25cee5105506822507b1f9f8e0ec820d14ed3be8949313d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956856
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956856
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR3751900200
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:25:57Z
    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 0xd4877d0a4e6f6112b25cee5105506822507b1f9f8e0ec820d14ed3be8949313d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BR3751900200.
      date published: 2026-07-06T01:25:57Z
    audio: Começar de Novo
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 151.921
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.66
      additional property: Energy
        type: PropertyValue
        value: 0.541
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.252
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.192
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.138
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Juca Chuquer
  type: MusicAlbum
  date published: 2019-10-09
album: Amigo (Apollo 55 Remix)
  type: MusicAlbum
  date published: 2019-12-11
album: Arquiteta
  type: MusicAlbum
  date published: 2020-09-25
album: Arquiteta
  type: MusicAlbum
  date published: 2020-09-25
album: Nós Dois e Só
  type: MusicAlbum
  date published: 2020-10-30
album: Se o Amor É um Lugar
  type: MusicAlbum
  date published: 2021-02-05
album: Se o Amor É um Lugar
  type: MusicAlbum
  date published: 2021-02-05
album: Você Já É de Casa
  type: MusicAlbum
  date published: 2021-11-29
album: Teu Beijo
  type: MusicAlbum
  date published: 2022-05-27
  track: Teu Beijo
    type: MusicRecording
    duration: PT2M28S
    duration ms: 148738
    explicit: false
    by artist: Juca
    in album: Teu Beijo
      type: MusicAlbum
      date published: 2022-05-27
    genre: mpb
    genre: nova mpb
    isrc code: BRQ8J2000005
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T15:32:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x6d40a693c9872dd185802dee6a9e068bc4d75bf55ed18759dca5daad0408878e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958907
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958907
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRQ8J2000005
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T18:35:21Z
    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
    audio: Teu Beijo

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d40a693c9872dd185802dee6a9e068bc4d75bf55ed18759dca5daad0408878e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:35:21Z), 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/BRQ8J2000005.
date published: 2026-07-20T18:35:21Z

Teu Beijo
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 90.146
additional property: Musical Key
  type: PropertyValue
  value: 4
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.719
additional property: Energy
  type: PropertyValue
  value: 0.57
additional property: Speechiness
  type: PropertyValue
  value: 0.052
additional property: Acousticness
  type: PropertyValue
  value: 0.405
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.123
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.621
additional property: Loudness (dB)
  type: PropertyValue
  value: -8.798
additional property: Key Name
  type: PropertyValue
  value: E
additional property: Mode Name
  type: PropertyValue
  value: Minor