There's no reason nor benefit for having an entire altcoin network running its own internal/circular security incentive structure just to have a list of keys or names for something. This could just as easily be done on bitcoin if all you needed was a hash of the canonical truth published somewhere reliable. But even then I still don't think that makes much sense.
Having an entirely separate blockchain for this, however, is like trying to use an excavator to carve a tiny wooden figurine. It's just not the tool for the job no matter how many individual pieces of it seem like they are relevant or similar. You don't need (or want) global consensus on all accounts and all keys and all networks. You want individual control and reliable syncing of state among those that care.
