There are a few things you can do. One, is surf the web under your name, your tag, or your company name if applicable. You'd be surprised what shows up. For example,
this monday, I surfed under my name, viewing images. I found that Forbes used one of my pix in a web article this week. . At the same time, on the same page, I found a national park related website using
several of my pix. By tags showing up on the copyright with the pix, I knew that all these particular pix came from SS.
I have also written to some places that I've found buying my pix asking for samples. I have been successful with this as well.
Snoop around, you probably will find some of your work.

=tom