{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the purpose of timestamps in blockchain?","a":"Preventing tampering: Each block contains the hash value of the previous block. Through the association of the  timestamp and the block hash value, once the data in a block is altered, it will cause the hash value of subsequent blocks to change, making the entire chain invalid. Therefore, it is difficult for attackers to tamper with the data in the blockchain."}]}],"pr":"5b433d5d4048eaf85f75deb0c9991b3ed5e9e22f64c5e1fa9cb560c88dcab543"}