What about proof of rhyme?
You have to rap every time
If not, your message isn't fine
Remember: two plus six isn't nine

Wahou never heard of that project. Like the idea

JohnOnchain

The concept is very similar to [this one](https://stacker.news/items/54417) which is really cool

EnormousPony

super_testnet

Even if all messaging systems worked with PoW antispam.
Bitcoin would still be considered boiling the oceans.

Leslie

nostr


Nostr with NIP13 https://github.com/nostr-protocol/nips/blob/master/13.md defines a way to generate proof of work (a la bitcoin) on the client side. 
A relay and a client can filter event based on the difficulty.


Nostril is a command line tool that let you produce a message with proof of work. 

Here an example.
https://nostr.rocks/event/00000566c20b887f766c29941b38d87f1d02e5073b5b5e4310dc5648ffd0be32

![](https://s3-eu-west-1.amazonaws.com/public-bucket-john-897867457987890896/1660723767003.jpg)