Ferreira & Ferreirinha
type: MusicGroup
genre: pentecostal
genre: sertanejo tradicional
popularity: 6
followers: 297
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa1b215cfcac9d30e2fda86c1b21227012a31f34f8db14e3bdd3e185750867712
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/93f458f3-577b-4f06-b524-23020d77db10.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/93f458f3-577b-4f06-b524-23020d77db10.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/93f458f3-577b-4f06-b524-23020d77db10
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa1b215cfcac9d30e2fda86c1b21227012a31f34f8db14e3bdd3e185750867712","name":"Ferreira & Ferreirinha","registered_at":"2026-06-17T17:19:27Z","symbol":"NIM1464958","token_address":"0x9f20b6935429caefc438207e94c781a48d2a7273","type":"artist","uuid":"93f458f3-577b-4f06-b524-23020d77db10"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b215cfcac9d30e2fda86c1b21227012a31f34f8db14e3bdd3e185750867712. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93f458f3-577b-4f06-b524-23020d77db10.json and https://artists.proofprofile.net/proofs/artist/93f458f3-577b-4f06-b524-23020d77db10.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xa1b215cfcac9d30e2fda86c1b21227012a31f34f8db14e3bdd3e185750867712","name":"Ferreira & Ferreirinha","registered_at":"2026-06-17T17:19:27Z","symbol":"NIM1464958","token_address":"0x9f20b6935429caefc438207e94c781a48d2a7273","type":"artist","uuid":"93f458f3-577b-4f06-b524-23020d77db10"}
album: Remando o Barco
  type: MusicAlbum
  date published: 1998-01-01
album: Cruz Pesada
  type: MusicAlbum
  date published: 1999-01-01
album: Crente Fiel
  type: MusicAlbum
  date published: 2003-01-01
album: Sermão da Montanha
  type: MusicAlbum
  date published: 2012
album: Nossa História
  type: MusicAlbum
  date published: 2014