Hi in the cryptosphere you can use a program that will but meta data into your picture a bit like peer tracks that you find under music, also you can look at selling your images to a online distribution company let people know these are copyright images of your own work and point people to where they can use the images legally, I hope this helps, but like music sometimes it can help getting your images out but just make sure you have the meta data or encryption with in the image so you can follow who is doing what.