He has a private group, a very small group .
Before 2020,it’s free to join. It was free but you need to prove you have 100+ bitcoins on hand.
The group’s website(a ugly but powerful forum

)changes yearly,only people who has 100+ bitcoins will be notified.
Of course,No one has his charisma.to prove he is him,he will sign a message “with time,new url,latest block hash”
That is why I asked you for this topic.
Anyone know a professional way to sign and verify a message?