I followed @simon's superb tutorial here for GitHub with GitHub pages verification and redirect support (I don't have much of anything on GitHub since retiring and then not retiring)
https://til.simonwillison.net/mastodon/verifying-github-on-mastodon
Worked a treat, needed a tiny edit for it to work, for reasons it wasn't reading the rel=me in the meta tag, but the A in the body worked, this could have been eventual consistency or something, but anyway this did it for a green tick
https://github.com/DrCuff/drcuff.github.io/blob/main/index.html



