Is my creativity is safe on web?

One fine morning i was wandering if there was any tool to trach whether a particular image is copied/duplicated and reused in the other website. Some times the clients are very serious on this topic that the graphics used in his/her portal shouldn't be replicated(ofcourse if he has paid money for those photographs/images). For content there is tool like(copyscape) and we can google also not an issue. We followed those methods only while payoff to contentwriters but what for graphic designers. Thank God to to new Google Image search which has the feature to upload your image and get it searched for its existence in the web media. Another good tool i got is Tineye which is excellent tool for working and proofchecking of images