{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of the evidence module (or witness) in the blockchain?","a":"The main function of the evidence module in blockchain is to ensure the authenticity, integrity, and traceability of data. By uploading key data, information, or evidence onto the chain, the evidence module provides a tamper-proof and reliable mechanism for storing and verifying evidence for various entities. This helps to solve trust issues, reduce transaction costs, and improve the efficiency of business processes. In various fields such as cross-border  electricity trading, data sharing, copyright protection, and more, the blockchain evidence module has extensive application value."}]}],"pr":"1a793b44c59fdfe9b2188bdd4bcd50ffe09bc69c67f64aa5124f1ead08704624"}