I have a little trick. Apart from the reverse Image search i sometimes ask for a selfie with my name in it. Written on a paper. No Digital name. It can still be a scam but that way you can get a real picture. I even had a philipine girl who wrote my name on her body and send a video. Ok. Philipine woman only want money but at least you know She is real.

The scammers are getting better at doctoring pictures.. you ask them to send a picture of them holding a peice of paper saying your name and date - they will find some one holding a peice of paper and then add the information to the paper that you asked them too put and then put there face over the person in the pictures face...