Two key figures in Bitcoin's creation took the stand in the Crypto Open Patent Alliance (COPA) case against Craig Wright, an early Bitcoin developer who claims to be the pseudonymous bitcoin creator Satoshi Nakamoto. 

Adam Back, pioneer of Bitcoin's proof-of-work consensus system, and early Bitcoin contributor Martti Malmi disputed claims from Wright's testimony, according to a statement to the press shared with The Block. Back and Malmi, as witnesses for COPA, aim to show the court that Wright is not Nakamoto, thereby negating Wright's claim to intellectual property ownership over Bitcoin. 

COPA, which first filed a lawsuit in the UK disputing Wright's claims in April 2021, aims to stop Wright from asserting copyright claims over the Bitcoin whitepaper and database. According …