Block
Changing the data invalidates the block, you'd have to mine it to get a valid hash.
Block:
Nonce:
Data:
Hash:
Each mine ensures the hash starts with 0000 by updating the nonce
Changing the data invalidates the block, you'd have to mine it to get a valid hash.
Block:
Nonce:
Data:
Hash:
Each mine ensures the hash starts with 0000 by updating the nonce