TinEye is a solution for photographers wondering where their work has shown up. Whether you’re searching for copyright infringement or just curious on how far that Creative Commons photo has made it, TinEye is a handy tool.
The site is still in beta, but I put my name into their invite request form this morning and received an invite this afternoon — not a long wait at all. The search function is very simple: you can select a photo as if you were uploading it to a site. You can also paste in an image URL or use TinEye’s browser plugin.
TinEye then finds matching images. I searched for the photo I’ve used as my profile picture on hundreds of sites. TinEye didn’t find all of them, but those images it found were exact matches.