{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the security and immutability of transactions?","a":"Timestamps:  Each block in the blockchain contains a timestamp, which records the time when the block was generated. This helps maintain the chron"}]}],"pr":"516a46a03d6f2f5d37078122b3e3c396bbba2688ee962c72552b4497936f064c"}