João Kleber e Humberto
type: MusicGroup
genre: sertanejo
popularity: 13
followers: 722
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSVerificationAPI
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc621c4f5bb77d679200697526c2eb7b1da2135192b055d0401bd0e515e072668. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4de9f6f-6c94-41fc-8c41-3686baeac7e6.json and https://artists.proofprofile.net/proofs/artist/e4de9f6f-6c94-41fc-8c41-3686baeac7e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:22:30Z
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album: Matuto Problema
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  date published: 2021-08-27
  track: Matuto Problema
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    by artist: João Kleber e Humberto
    in album: Matuto Problema
      type: MusicAlbum
      date published: 2021-08-27
    genre: sertanejo
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    additional property: CopyrightID
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T12:31:54Z
    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ee5c050493f978a2b836575c2da47486fa43eb51ba2f1782edd571ab52fc5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BXTB12100185.
      date published: 2026-07-05T12:31:54Z
    audio: Matuto Problema
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        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
        type: PropertyValue
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.384
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        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
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album: Doeu
  type: MusicAlbum
  date published: 2021-10-15
album: Na Medida (Ao Vivo)
  type: MusicAlbum
  date published: 2023-02-04
  track: O Que Combina Comigo É Você - Ao Vivo
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    duration: PT3M21S
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    by artist: João Kleber e Humberto
    in album: Na Medida (Ao Vivo)
      type: MusicAlbum
      date published: 2023-02-04
    genre: sertanejo
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T01:43:47Z
    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 0x626ec5106f87018d176d105d189778db0f4c2e33e0e6f0190989d875a3839c03. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:43:47Z), 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/US7VG2339789.
      date published: 2026-07-20T01:43:47Z
    audio: O Que Combina Comigo É Você - Ao Vivo
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.641
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        type: PropertyValue
        value: 0.684
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        type: PropertyValue
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Canarinho Magoado
album: Bebedores Beberão, Vol. 1 (Acústico)
album: Bebedores Beberão, Vol. 2 (Acústico)
album: Dois Caminhos
album: Opala Véio
album: Morro de Ciúmes
album: Decisão
album: Forasteiro

Liveness
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value: 0.176

Valence (Positivity)
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value: 0.63

Loudness (dB)
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Key Name
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Mode Name
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Canarinho Magoado
type: MusicAlbum
date published: 2023-05-19

Bebedores Beberão, Vol. 1 (Acústico)
type: MusicAlbum
date published: 2023-07-08

Bebedores Beberão, Vol. 2 (Acústico)
type: MusicAlbum
date published: 2023-08-18

Dois Caminhos
type: MusicAlbum
date published: 2024-02-02
track: Dois Caminhos
  type: MusicRecording
  duration: PT3M15S
  duration ms: 195652
  explicit: true
  by artist: João Kleber e Humberto
  in album: Dois Caminhos
    type: MusicAlbum
    date published: 2024-02-02
  genre: sertanejo
  isrc code: BXTB12300371
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
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    value: 2026-06-29T04:57:28+00:00
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  additional property: OTSHash
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXTB12300371
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T16:51:38Z
  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 0x8369e29038b91a6a93c63aaadd8cfc1a736dd38175e5bac51a9c5670f46f127a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXTB12300371.
    date published: 2026-07-02T16:51:38Z
  audio: Dois Caminhos
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
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    additional property: Musical Key
      type: PropertyValue
      value: 6
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.577
    additional property: Energy
      type: PropertyValue
      value: 0.843
    additional property: Speechiness
      type: PropertyValue
      value: 0.078
    additional property: Acousticness
      type: PropertyValue
      value: 0.322
    additional property: Instrumentalness
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      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.232
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.75
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.459
    additional property: Key Name
      type: PropertyValue
      value: F#
    additional property: Mode Name
      type: PropertyValue
      value: Major

Opala Véio
type: MusicAlbum
date published: 2024-03-22

Morro de Ciúmes
type: MusicAlbum
date published: 2024-05-31

Decisão
type: MusicAlbum
date published: 2024-10-11

Forasteiro
type: MusicAlbum
date published: 2025-04-18