I'd think, unless contested, that they coukld be hosted anywhere, so long as profits were not garnered from them. It may well be that Ironhart had no next of kin, OR anyone would could lay claim to his assets at all. I'd think the worst someone could do if they were hosted anywhere as a memorial would be a "cease and desist" thing. (Just like if you sell something resembling a copyrighted item in the us.)

Way too many people take way too many things way too seriously.