First and foremost, it's better to turn someone away if you can't validate them. Never chase after money, not all money is good.
Most of the ladies who are Indy screen potential clients by asking for references, usually two legit providers. You will need to take that info and reach out to them to get validation of the person. I don't know if you have paid for VIP, but it would be a smart idea to so that ladies can message you privately. Some things, like the methods they use are better said in private.
Another option is to attempt to get a Preferred411 (P411) account. You will need to give up personal data if you have no reviews. Its a verification site that is very popular by both parties. For ladies, a profile is free. They are very strict in approving a request to join their service. You may be declined initially.
A third option is to hire an assistant or booking agent. They get a fee, but it's most likey a lot more than the amount you specified. They do much of the ground work, including screening. I'm over simplifying it, some of the ladies who may respond can be more specific in private.
Finally your other option, would be to join an agency. Again they do all the work, but it also comes with some requirements. Again, the ladies who respond can give you more details in private.