Oppenheim + Zebrak is a United States law firm specializing in copyright infringement and anti-piracy. The firm was founded in 2011 by Matt Oppenheim and Scott Zebrak and is based in Tenleytown, Washington, DC.

In Cengage v. Book Dog Books, Oppenheim + Zebrak represented publishers Cengage, McGraw-Hill Education, Pearson Education, and Wiley (as the "Educational Publishers Enforcement Group") against a reseller of textbooks. In an April 2018 verdict, a jury awarded the book publishers $34.2 million in damages for trademark and copyright infringement.^[1][2]

In Sony v. Cox, Oppenheim + Zebrak represented music corporations Sony Music, Warner Records and Universal Music in a lawsuit against Internet service provider Cox Communications for "enabling its subscribers to copy more than 10,000 works over peer-to-peer networks like BitTorrent." In a $1 billion verdict, the jury awarded the multinational companies nearly $100,000 for each infringed work. In an opinion written by judge Liam O'Grady, the court denied Cox's motion for a new trial, finding the award "wasn't grossly excessive."^[3]

In a June 2020 lawsuit against the non-profit Internet Archive, Oppenheim + Zebrak represented Hachette, Penguin Random House, John Wiley & Sons, and HarperCollins, all members of the Association of American Publishers.^[4] The suit, filed in the Southern New York Federal District Court, alleges that the Open Library violated copyright when it established a National Emergency Library service during the COVID-19 pandemic when most libraries were closed to the public.^[5][6]