The Washington Post article linked in "Read More" claims:
Thankfully, this isn’t specific to Mastodon alone — this method is a standard supported by other networks, which means The Post can support verification elsewhere in the future.
However, after a quick Google search, it seems only Mastodon supports this. All results for "fediverse verify" only mention Mastodon.
Is this specific to the Mastodon implementation or is it in the ActivityPub protocol specification?
The Washington Post article linked in "Read More" claims:
However, after a quick Google search, it seems only Mastodon supports this. All results for "fediverse verify" only mention Mastodon.
That likely just means that none of the other fediverse projects has implemented it yet.
I know that Calckey and its descendants support it since I verified my account on a Calckey instance, and Akkoma mentions it in this blog post.