Bitcoin - What is Proof of Work in Mining? | Explained for Beginners Simply put, Proof of Work is a system used by some blockchains to secure the network and verify transactions by performing mathematical computations that require a massive amount of processing power. The first time you are included in a conversation about Bitcoin mining, I am sure that you will be confused and overwhelmed. "Proof of what now?" "Like submitting a work assignment?" Let's say its kind of like that but don't worry I will try to explain. Just don't give up yet. 😁 Is Bitcoin the only Proof-of-Work cryptocurrency? No! Although this blog focuses on Bitcoin, it is far from the only coin that utilises a Proof of Work system. Proof of Work is also used by popular coins such as Litecoin, Monero, Ethereum Classic, and Dash, as well as Bitcoin derivatives such as Bitcoin Cash. Ethereum was running on Proof of Work, but recently switched to Proof of Stake. To keep things s...