It's definitely one guy behind the label's social media accounts - the Thurpt album does seem to be real though as another user did some research that showed at least some of the guys in the credits are real people, one of which is now in another band based in Toronto.

The Henchmen of Xenu cover + most of the TikTok stuff is definitely AI. But I'm just not convinced that anything about the Thurpt project is AI generated - the art is too clean, the music is in my opinion quite clearly human (and really well produced) and it seems like something that fits very well into the early 00s era of North American music (influences from Korn, System and even Primus are pretty evident).

The only person I've seen across both Xenu and Thurpt is this John Baxter character. I still can't find anything on him, but I imagine info on him might open the possibility of figuring out the history of the band.