Os Filhos do Nordeste
type: MusicGroup
genre: forró
genre: forro tradicional
popularity: 7
followers: 752
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x6a8690c0c50d9fcbda2826a3ea9631c22c25a9accefbd570a3fae789f98255aa
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
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  value: https://artists.proofprofile.net/proofs/artist/e3cbea53-454c-4652-9137-b9be4fe7083a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e3cbea53-454c-4652-9137-b9be4fe7083a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e3cbea53-454c-4652-9137-b9be4fe7083a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
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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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8690c0c50d9fcbda2826a3ea9631c22c25a9accefbd570a3fae789f98255aa. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3cbea53-454c-4652-9137-b9be4fe7083a.json and https://artists.proofprofile.net/proofs/artist/e3cbea53-454c-4652-9137-b9be4fe7083a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x6a8690c0c50d9fcbda2826a3ea9631c22c25a9accefbd570a3fae789f98255aa","name":"Os Filhos do Nordeste","registered_at":"2026-06-21T07:39:16Z","symbol":"NIM1865132","token_address":"0x700c275eaecedeb77af5dba709420631a9ec6b75","type":"artist","uuid":"e3cbea53-454c-4652-9137-b9be4fe7083a"}
album: Senta Aqui Morena
  type: MusicAlbum
  date published: 1972-01-29
album: Forró à Noite Inteira - Lado B
  type: MusicAlbum
  date published: 1974-07-08
album: Forró à Noite Inteira - Lado A
  type: MusicAlbum
  date published: 1974-07-08
album: Filho de Forrozeiro
  type: MusicAlbum
  date published: 1982-06-01
  track: Pra Fazer Besteira
    type: MusicRecording
    duration: PT2M41S
    duration ms: 161462
    explicit: false
    by artist: Os Filhos do Nordeste
    in album: Filho de Forrozeiro
      type: MusicAlbum
      date published: 1982-06-01
    genre: forró
    genre: forro tradicional
    isrc code: QZGLS2299730
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T21:27:11+00:00
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      type: PropertyValue
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      value: 959061
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959061
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2299730
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T21:34:21Z
    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 0xcfac569e53d90e51cbcd36482b102d44eb0e6da31588df11af2c98e9e95f838b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZGLS2299730.
      date published: 2026-07-21T21:34:21Z
    audio: Pra Fazer Besteira
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.559
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.754
      additional property: Energy
        type: PropertyValue
        value: 0.75
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.389
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.202
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.969
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.566
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Forró na Casa de Tomé
    type: MusicRecording
    duration: PT2M6S
    duration ms: 126014
    explicit: false
    by artist: Os Filhos do Nordeste
    in album: Filho de Forrozeiro
      type: MusicAlbum
      date published: 1982-06-01
    genre: forró
    genre: forro tradicional
    isrc code: QZGLS2299735
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    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2299735
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T23:41:40Z
    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 0x760b55a3e6b7e26c139444b172b974e6d8f6deac779c6d21e01ee0d8e0540812. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZGLS2299735.
      date published: 2026-07-21T23:41:40Z
    audio: Forró na Casa de Tomé
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.638
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.728
      additional property: Energy
        type: PropertyValue
        value: 0.726
      additional property: Speechiness
        type: PropertyValue
        value: 0.042
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Isso É Que É Forró
album: Terremoto do Amor (Ao Vivo)
album: No Balanço do Forró (Ao Vivo)

Acousticness
type: PropertyValue
value: 0.456

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.107

Valence (Positivity)
type: PropertyValue
value: 0.95

Loudness (dB)
type: PropertyValue
value: -11.156

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Minor

Isso É Que É Forró
type: MusicAlbum
date published: 1989-04-07

Terremoto do Amor (Ao Vivo)
type: MusicAlbum
date published: 2021-08-30

No Balanço do Forró (Ao Vivo)
type: MusicAlbum
date published: 2021-08-30