Sofia Castillo About Sofia Sofia Castillo is a member of Mitchell Silberberg & Knupp’s Entertainment Transactions Group based in Washington DC. Sofia advices and counsels entertainment media companies and individual creators on copyright and trademark matters, and has experience drafting and reviewing contracts pertaining to content development, production, licensing and distribution. Sofia also represents trade associations in the book publishing, film, entertainment software, and music industries on copyright policy matters including advocating before the U.S. Congress on the Digital Millennium Copyright Act, limitations and exceptions, and international trade and treaty implementation. Previously, she was Assistant General Counsel at the Association of American Publishers and a Legal Fellow at the Copyright Alliance. She is an active member of the Hispanic Bar Association – DC Chapter and the Hispanic Lobbyists Association. Sofia obtained her law degree from American University, Washington College of Law, a master’s degree from Stanford University and a bachelor’s degree from Trent University.