In the transcribed hearing founder makes it clear that it's more about educated guess based on publicly available information. Net worth and not the owned assets which is completely different number (as celebrities usually have rights to their personal brands which are not transferable).

In general this in theory could be challenged, but mostly based on the name and photos and not about inferred information. This might get even worse since a lot of celebrities are using stage names which might be protected as a brand but go unprotected as a personal information.