I am somewhat new to the hobby- kind of transferred over from BDSM.

Question:

Any tricks/methods for filtering/discerning the ads that advertise one
provider then you show up to find someone different. Usually these ads
are placed on Backpage.

I find this kind of stunning that they would do this.
Fals advertising. Guess I am naive.

Dommes never do this.

Do a Google Image Search and it will help.

Also look for reviews, if the girl doesn't have any, thats a good sign you need to pass.

....and say her reviews?
"Search Provider Reviews" on this site using her email and/or phone number?
Who knows.....

Just do the research.  Get VIP, read the reviews, check the phone number, check out the pictures.  Like I have said numerous times, you can look anywhere for a potential escort, but you got to follow up with the research.  As you admit, you are new to the hobby, so stick to well-reviewed providers that have reviews done by established reviewers.  Minimum of 6-10 reviews for her, and same number of reviews by the writers.

Swim

My solution is....

TinEye is a reverse image search engine built by Idée currently in beta. Give it an image and it will tell you where the image appears on the web.

Tineye was the bomb when it first came out, but google image has surpassed it and is much better now. I have found many results in goolge, when tineye returned nothing on the same image search.