U.S. lawmakers propose alternative to Stop Online Piracy Act. Proposal would allow the International Trade Commission to investigate complaints of copyright infringement. The ITC already investigates patent infringement complaints and can bar infringing products from being imported into the United States. Opponents of SOPA say the legislation lacks strong due-process protections for website owners. SOPA would allow copyright holders to seek court orders to stop online ad networks and payment processors from doing business with foreign sites accused of infringing copyright, among other things.”]