Ethereum Classic is a continuation of an older Ethereum upgrade called ‘Homestead’. Both Ethereum and Ethereum Classic use a Proof of Work algorithm to carry out transactions. As they state on their official website: ‘ETC is the continuation of the unaltered history of the original Ethereum chain’. In July 2016, the Ethereum foundation decided to create a hard fork of the Ethereum blockchain. The group, who later came to be known as the ETC community, wanted to keep the original chain in order to maintain the immutability proposed in the initial white paper.