# 证明（Proof）

Aptos 区块链使用证明来验证区块链数据的真实性和正确性。

Aptos 区块链中的所有数据都存储在一个单一版本的分布式数据库中。每个验证器和 FullNode 的[存储](/ji-chu/yan-zheng-zhe-jie-dian.md#storage)负责将商定的事务块及其执行结果持久保存到数据库中。区块链被表示为一个不断增长的 [Merkle 树](https://aptos.dev/reference/glossary#merkle-trees)，其中每个附加到树的叶子代表由区块链执行的单个事务。

区块链执行的所有操作和所有账户状态都可以加密验证。这些加密证明确保验证者节点就状态达成一致。通过支持证明，客户端不需要信任它从中接收数据的实体。例如，如果客户从一个帐户中获取最后 n 笔交易，则证明可以证明在响应中没有添加、省略或修改任何交易。客户端还可以查询帐户的状态，询问是否处理了特定交易，等等。


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