One could also envision a series of redirects.
My information is stored on server <foo> but all of my canonical ids reference hrefna.dev/whatever.
Why? Because I'm proxying the calls over to a backend server that I reserve the right to change in the future.
There are a thousand things you can do from here, but basically we now have a basic lightweight framework for a scalable, message-passing-based social network.
10/10