Before github came out with social links on profiles, to get verified on mastodon, I had needed to set up an automatic redirect to get Mastodon to verify my identity as well link to my actual profile.
Mastodon → Proxy Html with rel=me link → Re-direct to github profile
The redirect was enabled by the http-equiv pragma directive like this.
<meta http-equiv="refresh" content="0; URL=https://github.com/psumiya">See the usage here: https://github.com/psumiya/psumiya.github.io/blob/main/index.html
Here is a link that has better details about this directive: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/meta#attr-http-equiv