... So what? I can do this too and form a fancy saying using dozen of addresses whose public keys once summed in secp256k1 will give you satoshi's public key.
The result is the ECC sum of 7 pubkeys from which 2 are early (2009) addresses. And the result has been signed. How can one add addresses and sign with the sum/result? I would be grateful if you explained it here with examples.
At least learn first how signed message works, and how it can be verified using tools (signature verifier). Provide wallet address, message (signed message) with date, and the signature. What you show is just wallet address and random characters (public keys) you're calling signature or what?.
(Edited the 1st post. The signature was in the code box.)
I checked the signature, it is working. (
https://www.verifybitcoinmessage.com/)