I'd follow along with what the IndieWeb folks are doing. They've got a pretty good principle of reusing existing infrastructure in new ways to build interesting things without needing coordinated upgrades.
As an example, getting widespread adoption of a new TX DNS record type is unlikely, though you can fake it with TXT records.
As an example, getting widespread adoption of a new TX DNS record type is unlikely, though you can fake it with TXT records.
https://indiewebcamp.com/Category:building-blocks