I know there's a tool within Dreamstime for searching the web for our images but I'm having a lot of trouble finding it. When I hover the cursor over and next to my images, I see the 'edit' and 'referral url' options but no sign of the web search option. Google image reverse search is not effective anymore since they changed that.
You can also just do a Google search for something like your name or Dreamstime ID followed by @dreamstime to find images used and credited. Not every buyer includes a credit line with an image though.