You can already do this extremely well with PimEyss and (especially) FaceCheck (which has indexed a lot of Instagram and LinkedIn); make a tool out of them for an LLM to use, and it could likely automate all the boring parts of cross-referencing.
(One thing that is limiting about it vs. PimEyes is that it doesn't have a UI to select which face you want from your reference photo, so you have to crop other people out of the frame.)
phatskat•11h ago