Oh wow, I missed this. Was this sent from one of the BTC addresses allegedly owned by Satoshi, or by some other address that CW said was his?
The known identity thief CSW submitted a list of addresses to court of coins and addresses he claimed were his but he could not currently access. Then the true owner of a bunch of those addresses signed this message calling him a lying piece of shit.
Just think this reasonably; if a malicious guy wanted to prove Craig Wright is Satoshi, why not just give you a signed message from the - 1C7X4UWpSa4GteWHaRBm49fMCC2SNvJQF - which supposedly a Satoshi's address?
I'm not exactly a big fan of Ethereum, but Vitalik said this once about the known liar CSW:
In general, signal theory says if you have a good way of proving something and a noisy way of proving something and you choose the noisy way chances are it's because you couldn't do the good way in the first place.
The good way is to sign a message from 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa, the receiving address for the coinbase transaction of the genesis block. The noisy way is whatever this absolute nonsense is, along with every other fake signature or fake proof the known fraud CSW has provided in the past.