Bitcoin calculate block hash

The Bitcoin Core client stores the blockchain metadata using Google's LevelDB database. The “previous block hash” field is inside the block header and thereby affects the current block's hash. Calculating the nodes in a merkle tree. you can play around with calculating and verifying a Bitcoin block hash. Simply enter all necessary data and get the block hash calculated. The version is wrong: I have 02000000. But the one that appears on the block is. Version 0x20000000. Doing the formatting: 00000020.