I pulled up www.tineye.com and saw a phone number which I called.  They said that many sites may have put your picture on their sites.  Or as I thought some could be uploaded let's say from a photobucket, flickr, account that allows public access.

 

For starters my suggestion is to start contacting those sites that all the 83 pictures are on.

 

At the bottom of the link you sent is the phone # I called.  Give them a call, and perhaps they may have some other suggestions for you to try.