DAAs Consumer Choice page, the, nAI's website, and/or the, eU online choices page, from each of your browsers or devices.
Of course, in all the above mentioned apps, you will not find only prostitute but you will definitely find enough of them for your needs and they will clearly present themselves as working boys/girls so you will not have to guess.
Plain-clothes policemen are regularly on site, while uniformed officers patrol the area.
'Thats something that would come out in discovery in any case.
One lawyer however has already blown a hole in this story pointing to the length of time the site has been.