Enable Mastodon Link Verification
Mastodon instances allow you to set custom "metadata" fields on your profile, including URLs. These are marked as "verified" if the linked page contains an a
tag pointing back at the user's profile with the rel="me"
attribute.
Currently, Tildes strips the rel
attribute from links defined in in user bios. If that weren't the case, you could directly "connect" your Tildes and Mastodon profiles.