Joyce Fernandes
type: MusicGroup
genre: brazilian hip hop
description: Joyce da Silva Fernandes (born May 13, 1985), also known as Preta Rara, is an Afro-Brazilian rapper, activist, and television host. A former maid, her work in internet activism against the subordinati
popularity: 4
followers: 140
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2bbda19fe4b62a615b8d57f9a791f202aadd3b33797ad83203887ec36e457691
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/c378472c-e9d4-4ade-a2d9-84c6d6dff538.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c378472c-e9d4-4ade-a2d9-84c6d6dff538.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c378472c-e9d4-4ade-a2d9-84c6d6dff538
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2bbda19fe4b62a615b8d57f9a791f202aadd3b33797ad83203887ec36e457691","name":"Joyce Fernandes","registered_at":"2026-06-20T20:03:34Z","symbol":"NIM1700678","token_address":"0x754d483050516ee26ba750b5e677a5441e964473","type":"artist","uuid":"c378472c-e9d4-4ade-a2d9-84c6d6dff538"}
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 0x2bbda19fe4b62a615b8d57f9a791f202aadd3b33797ad83203887ec36e457691. 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/c378472c-e9d4-4ade-a2d9-84c6d6dff538.json and https://artists.proofprofile.net/proofs/artist/c378472c-e9d4-4ade-a2d9-84c6d6dff538.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0x2bbda19fe4b62a615b8d57f9a791f202aadd3b33797ad83203887ec36e457691","name":"Joyce Fernandes","registered_at":"2026-06-20T20:03:34Z","symbol":"NIM1700678","token_address":"0x754d483050516ee26ba750b5e677a5441e964473","type":"artist","uuid":"c378472c-e9d4-4ade-a2d9-84c6d6dff538"}