Joãozinho Do Cavaco
type: MusicGroup
popularity: 4
followers: 55
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd75d2bdf7cd52ef18c8e7834100fc0aad714d4e1849d22dbb05b47f16b1e4c8e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fc3ea6b9-6cd6-46ae-9c2c-b2bb45610607.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fc3ea6b9-6cd6-46ae-9c2c-b2bb45610607.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fc3ea6b9-6cd6-46ae-9c2c-b2bb45610607
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd75d2bdf7cd52ef18c8e7834100fc0aad714d4e1849d22dbb05b47f16b1e4c8e","name":"Joãozinho Do Cavaco","registered_at":"2026-06-21T17:30:02Z","symbol":"NIM1987498","token_address":"0x7c6d882349d8c2d0ad94215ece3e4ee404e7b3d6","type":"artist","uuid":"fc3ea6b9-6cd6-46ae-9c2c-b2bb45610607"}
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 0xd75d2bdf7cd52ef18c8e7834100fc0aad714d4e1849d22dbb05b47f16b1e4c8e. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc3ea6b9-6cd6-46ae-9c2c-b2bb45610607.json and https://artists.proofprofile.net/proofs/artist/fc3ea6b9-6cd6-46ae-9c2c-b2bb45610607.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0xd75d2bdf7cd52ef18c8e7834100fc0aad714d4e1849d22dbb05b47f16b1e4c8e","name":"Joãozinho Do Cavaco","registered_at":"2026-06-21T17:30:02Z","symbol":"NIM1987498","token_address":"0x7c6d882349d8c2d0ad94215ece3e4ee404e7b3d6","type":"artist","uuid":"fc3ea6b9-6cd6-46ae-9c2c-b2bb45610607"}
track: Ternura - Instrumental

Ternura - Instrumental
type: MusicRecording
duration: PT3M32S
duration ms: 212183
explicit: false
by artist: Aleh Ferreira
by artist: Luizinho 7 Cordas
by artist: Tigrão
by artist: Zé Barbeiro
by artist: Alexandre Ribeiro
by artist: Rafael Martinez
by artist: Joãozinho Do Cavaco
by artist: Eser Menezes
by artist: Rafael Petrucelli
in album: Choros Inéditos
  type: MusicAlbum
  date published: 2005-01-01
genre: brazilian-classical
genre: bandolim
isrc code: BRTRB1873679
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 957055
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957055
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRTRB1873679
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T15:12:44+00:00
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 957055
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-07T15:12:44+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39ca7818af2f52d30ac5c3d1ee68e9ac9d514c03e2206c42a47c58dfd24d99c. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:15:20Z), 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/BRTRB1873679.
  date published: 2026-07-21T23:15:20Z
audio: Ternura - Instrumental
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 189.674
  additional property: Musical Key
    type: PropertyValue
    value: 6
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.23
  additional property: Energy
    type: PropertyValue
    value: 0.448
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.445
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.504
  additional property: Liveness
    type: PropertyValue
    value: 0.071
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.462
  additional property: Loudness (dB)
    type: PropertyValue
    value: -9.42
  additional property: Key Name
    type: PropertyValue
    value: F#
  additional property: Mode Name
    type: PropertyValue
    value: Minor