Bitcoin Fog operator’s conviction upheld without Chainalysis disclosing source code

A U.S. appeals court upheld Bitcoin Fog operator Roman Sterlingov’s conviction, rejecting arguments that Chainalysis had to disclose its proprietary source code for the defense to challenge blockchain-tracing evidence. The ruling indicates that courts may accept commercial blockchain analytics as evidence without requiring vendors to reveal their underlying code, provided defendants can contest the methods through other means. For Bitcoin users, it reinforces that transactions routed through mixers can remain traceable and may support criminal prosecutions.