Marcelo Café
type: MusicGroup
genre: samba
popularity: 5
followers: 600
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2caea2f746bc16ee11a2dc08a533b66210b6e82b3f5982fa1fa8b89e0703c4f7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c123eef3-9cf9-4b05-8e6c-8f3e69cf8ff6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c123eef3-9cf9-4b05-8e6c-8f3e69cf8ff6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c123eef3-9cf9-4b05-8e6c-8f3e69cf8ff6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2caea2f746bc16ee11a2dc08a533b66210b6e82b3f5982fa1fa8b89e0703c4f7","name":"Marcelo Café","registered_at":"2026-06-20T19:29:37Z","symbol":"NIM1693149","token_address":"0x89527049dc32c142376740b1dad03e0c6eae3413","type":"artist","uuid":"c123eef3-9cf9-4b05-8e6c-8f3e69cf8ff6"}
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 0x2caea2f746bc16ee11a2dc08a533b66210b6e82b3f5982fa1fa8b89e0703c4f7. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c123eef3-9cf9-4b05-8e6c-8f3e69cf8ff6.json and https://artists.proofprofile.net/proofs/artist/c123eef3-9cf9-4b05-8e6c-8f3e69cf8ff6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0x2caea2f746bc16ee11a2dc08a533b66210b6e82b3f5982fa1fa8b89e0703c4f7","name":"Marcelo Café","registered_at":"2026-06-20T19:29:37Z","symbol":"NIM1693149","token_address":"0x89527049dc32c142376740b1dad03e0c6eae3413","type":"artist","uuid":"c123eef3-9cf9-4b05-8e6c-8f3e69cf8ff6"}
album: Depois do Samba
  type: MusicAlbum
  date published: 2016-11-10
album: Preto Empoderado
  type: MusicAlbum
  date published: 2021-08-16
album: A Revolução É Preta
  type: MusicAlbum
  date published: 2021-08-28
  track: A Revolução É Preta
    type: MusicRecording
    duration: PT3M51S
    duration ms: 231509
    explicit: false
    by artist: Marcelo Café
    in album: A Revolução É Preta
      type: MusicAlbum
      date published: 2021-08-28
    genre: samba
    isrc code: BRX8Z2100011
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T08:42:11+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4965057df4b2ca97e9fbd12c5164d3a83a931f35c7408e9dddd3fbb61d13240a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956656
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956656
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRX8Z2100011
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T14:03:39Z
    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 0x4965057df4b2ca97e9fbd12c5164d3a83a931f35c7408e9dddd3fbb61d13240a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRX8Z2100011.
      date published: 2026-07-04T14:03:39Z
    audio: A Revolução É Preta
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 100.944
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.73
      additional property: Energy
        type: PropertyValue
        value: 0.582
      additional property: Speechiness
        type: PropertyValue
        value: 0.057
      additional property: Acousticness
        type: PropertyValue
        value: 0.381
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.338
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.927
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.216
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Diga Lá, O Nome Do Amor
  type: MusicAlbum
  date published: 2025-02-14
  track: Diga Lá, O Nome Do Amor
    type: MusicRecording
    duration: PT3M38S
    duration ms: 218945
    explicit: false
    by artist: Marcelo Café
    in album: Diga Lá, O Nome Do Amor
      type: MusicAlbum
      date published: 2025-02-14
    genre: samba
    isrc code: BRX8Z2400002
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T08:31:15+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x48efda67c3c5f558663a5b33455f1633ac0b8e7a071ee2e22fd65567003d435a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958388
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958388
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRX8Z2400002
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T09:14:21Z
    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
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48efda67c3c5f558663a5b33455f1633ac0b8e7a071ee2e22fd65567003d435a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRX8Z2400002.
      date published: 2026-07-17T09:14:21Z
    audio: Diga Lá, O Nome Do Amor
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 174.097
      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: 0.715
      additional property: Energy
        type: PropertyValue
        value: 0.693
      additional property: Speechiness
        type: PropertyValue
        value: 0.127
      additional property: Acousticness
        type: PropertyValue
        value: 0.448
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Ceilândia, a Uber (Crônica de uma arte que se habita) [Ao Vivo No Estúdio Panda]

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.145

Valence (Positivity)
type: PropertyValue
value: 0.796

Loudness (dB)
type: PropertyValue
value: -8.734

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Ceilândia, a Uber (Crônica de uma arte que se habita) [Ao Vivo No Estúdio Panda]
type: MusicAlbum
date published: 2025-03-27