International cooperation is key to combating cross-border copyright infringement, experts from China and the United States said during a seminar in Beijing on intellectual property rights protection.

Most IPR infringements are about copyright, with the Internet the main channel for sharing books, videos and films, according to a report by the National Copyright Administration.

The report showed that in 2010 and 2011, Chinese courts heard almost 100,000 IPR cases, with copyright quarrels accounting for almost 60 percent of them. More than half of those copyright violations involved the Internet.