The music industry is battling to stop piracy through Russia’s largest social network so that it can turn the country from a digital backwater in to a top music market. VKontakte, which is often called a Facebook copycat for its similar features and design, includes built-in file sharing. In a case brought by one label group, Gala, St Peterburg’s commercial court in January ruled vKontakte in breach of copyright. That buoyed labels’ global representative group, the International Federation of the Phonographic Industry. But now an appeal sought by vKontake is set to begin on May 17, and labels remain frustrated.