{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are data URIs in a blockchain defined to ensure their validity?","a":"Data Integrity: Blockchain adopts encryption algorithms to ensure the integrity of data during transmission and storage. Each block contains the hash value of the previous block, forming a chain structure. Therefore, if any data in a block changes, it will affect the hash value of subsequent blocks, making the entire chain invalid. Thus, to tamper with data in  a blockchain, one must simultaneously tamper with all related blocks and obtain approval from more than 51% of the nodes, which is virtually impossible in practical operations."}]}],"pr":"d21a2936969c0c0a214338de1d00696e6ba1266dc7332d56be4063171d78fec6"}