If you need more reason to question being #fedified, it's – already – a system with restricted access.
Many systems are centralized but there is no reason all need be and many reasons for some not to be. People have put a lot of thought into creating decentralized solutions and it's worth considering them before trying to recreate how something worked, before.
For instructions on verifying a personal website: https://barrd.dev/article/add-a-verified-website-to-your-mastodon-account/
And reasons to avoid #fedified: https://queer.party/@sammy/109347400549995722