Is AI Actually Citing Your Site? How to Measure What Google Rankings Can't (opens in new tab)

I've spent the past few weeks writing about LLMO: how to get cited by AI search engines, which content structures work, what Princeton's GEO study says about visibility. All useful stuff. One problem: I had no idea whether any of it was actually working. I was like a chef who obsesses over recipes but never tastes the food. My Google Search Console was immaculate. My LLMO measurement setup? I was literally typing "does ChatGPT know about my site" into ChatGPT and refreshing the page like a te...