BITCOIN RECORD // 03.03

PROOF OF WORK

> Agreement has a cost.

      [ NONCE ? ]
          |
   000000000000...
      \  |  /
       \ | /
     [ BLOCK ]
        /\
       /  \    *
      /____\  * *

SIGNAL RECOVERED // WORK DETECTED

Miners compete by performing computational work. Valid proof of work makes rewriting confirmed history increasingly costly while nodes independently check that blocks obey the rules.

The master did not ask who claimed to work. He asked for proof.

KEYBOARD // PRESS P · N · M · 0