So many guys and some ladies steal other's photos for personal gain. I've even had my photos posted in some man's youtube video in the past from an advertising website. Very frightening. I like that eros has that as an option. It works in the ladies favor. Try taking a screenshot of the image if you really need to do a reverse image search on an eros lady .  

http://www.theeroticreview.com/discussion_boards/viewmsg.asp?MessageID=70825&boardID=7&page=#70825

 
See link above for info

This is re-posted from my OP in Goldies thread. The second paragraph is pretty clear on what to expect:

Official Eros authenticated definition:
 
In order for an Eros advertiser to be eligible to have the Authenticated seal affixed to their advertisement or to be placed in Eros' Authenticated category, the Eros Guide must have received tangible information that the individual appearing in the photographs on any specific advertisement intended to be advertised on the Eros Guide as an individual providing adult companionship. Such proof could include comparing the pictures submitted to the Eros Guide on an advertisement with either government issued Id's or pictures taken by Eros Guide employees at many of the various industry related functions that the Eros Guide attends each year.
 
However, please be aware that the Eros Guide cannot and does not make any guarantees or warranties that either (a) the advertiser in the pictures on any particular ad will be the same individual who shows up for any date arranged between an advertiser and yourself, (b) that any of the text, including the name of the advertiser, or stats that appears on an advertisement is accurate or truthful

You can still image search the pictures.
I won't give you instructions here. Just google it. There are several very simple methods.