You mean prevent copying of things you made, that's not possible. Even in Minecraft it's impossible and they been doing this for decades.
Proper Minecraft people don't mind you copying any of their designs. As long as, if you make a video on the new design, you acknowledge the original person and their design. Same should apply to Empyrion as well.
If the BP in question is part of a Problem you have or provides evidence of an exploit you always can start a Conversation with a Moderator/Dev. Just go to the Top of this Page and click on the Envelope. It opens a Private Conversation to which you have to add the Name of the Dev you want to contact.
You can send them the .epb file directly in a private message. Or you can upload your blueprint to Steam as private, then go to your Steam workshop page and change the visibility to unlisted and send them the link.