It is proven! I am dngray on Keybase: https://keybase.io/dngray/sigchain#707e000545951e5d6fa84052ce75a2614358a3080f9834c68808bdcd1ebb9a110f
Looks like PrivacyTools services (Mastodon, Matrix, Peertube etc) are going to be down earlier than expected.
More information can be found here:
https://old.reddit.com/r/PrivacyGuides/comments/pymthv/is_privacytoolsio_matrix_server_broken/
Member of the PrivacyGuides.org team.