{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do multi-signature schemes in blockchains ensure the traceability of transactions?","a":"Distributed ledger: Blockchain adopts distributed ledger technology, storing transaction data on multiple nodes, ensuring the transparency and traceability of data. Each node saves the complete transaction records, and once the information is recorded on the blockchain, it cannot be tampered with."}]}],"pr":"877ee82e0b6d76b3e828c91dd150c3fdea7e45cd2ce87ac18dba055a52bcd820"}