To sign up for writing on the forum, you need to prove current ownership of one utxo (which you do not reveal; zkp) of taproot type of value 500K sats or more.
Instructions on how to do it linked from that main page. It's a bit fiddly but not difficult if you have tech experience. You can use Sparrow for accessing the coins after creating the ZKP of ownership, or you can use Core.
(Also it *should* be easy, not 'fiddly' but wallets don't support accessing private keys).
Despite the 'hodl' name, the coins are not locked after you make the proof, you can spend them immediately.
General background reading, first half of https://reyify.com/riddle
The anonymity set is about 200-300K utxos, but the server can verify your proof ~immediately!
The proving tool is at https://github.com/AdamISZ/aut-ct ; follow installation instructions on readme or choose binary release for macos or linux.
Still a WIP. Keep a copy of the private key until you spend it! Bear in mind the keyset updates once per 24 hours. Make sure your utxo was confirmed before the blockheight of the current keyset in /keysets.
