http://bentasker.i2p/posts/blog/software-development/automatically-reverse-searching-images-to-list-possible-concerns.html
Still, there were too many to check manually so I decided to write a script to automatically run a reverse image search of each, flagging any that appeared on other domains. This post (mostly) talks about the process of doing that. Finding a Suitable Reverse Image Search Service Google don't offer an API for reverse image searches and I didn't really want to spend time building a one-off scraper to use it, so, I searched around for pre-existing solutions.