There are plenty of ways around HDCP - some cheap HDMI splitters completely bypass it and will allow you to use your other screen. Typically the review section

There are plenty of ways around HDCP - some cheap HDMI splitters completely bypass it and will allow you to use your other screen. Typically the review section of a given HDMI splitter on Amazon is a dead give away as to wether they bypass HDCP. Failing that you can buy a HDFury device - which I've used plenty of times in large AV installs to avoid HDMI/HDCP problems...