Sandra Pereira
type: MusicGroup
genre: portuguese hip hop
description: Sandra Maria de Brito Pereira is a Portuguese Communist Party politician who served as a Member of the European Parliament between 2019 and 2024 on the Unitary Democratic Coalition list. Career Per
popularity: 3
followers: 8
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6222574077c8c7c534738ed3d2b7d898ee6a0f9f389cea438de7c4a59c343853
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d73be660-bdd2-4244-b706-7eb19090e8d0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d73be660-bdd2-4244-b706-7eb19090e8d0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d73be660-bdd2-4244-b706-7eb19090e8d0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6222574077c8c7c534738ed3d2b7d898ee6a0f9f389cea438de7c4a59c343853","name":"Sandra Pereira","registered_at":"2026-06-21T03:08:27Z","symbol":"NIM1801221","token_address":"0x87c46743f300ab6a8db9dd93ba2bd1c5b969117d","type":"artist","uuid":"d73be660-bdd2-4244-b706-7eb19090e8d0"}
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 0x6222574077c8c7c534738ed3d2b7d898ee6a0f9f389cea438de7c4a59c343853. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d73be660-bdd2-4244-b706-7eb19090e8d0.json and https://artists.proofprofile.net/proofs/artist/d73be660-bdd2-4244-b706-7eb19090e8d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:36:58Z
  text: {"copyright_id":"0x6222574077c8c7c534738ed3d2b7d898ee6a0f9f389cea438de7c4a59c343853","name":"Sandra Pereira","registered_at":"2026-06-21T03:08:27Z","symbol":"NIM1801221","token_address":"0x87c46743f300ab6a8db9dd93ba2bd1c5b969117d","type":"artist","uuid":"d73be660-bdd2-4244-b706-7eb19090e8d0"}