If the defense is worth his or her salt he could have a witness who talks about Shamir's paper and how even thorough analyses of the BlockChain have been inconc

If the defense is worth his or her salt he could have a witness who talks about Shamir's paper and how even thorough analyses of the BlockChain have been inconclusive and error-prone, thus casting doubt on whatever the state's witness says. The judicial system is far from perfect but in the great majority of cases it manages to reach the correct conclusion about the violation of the law.