Sorry can't sign right now, because I don't have a synced Bitcoin Core version and a safe environment at my disposal right now. Would take weeks.
You don't have to be synced to sign a message, but if it's security you're concerned about, alright.
if you have any doubt that I'm the rightful owner.
It's not about being the rightful owner, but rather about being the original one.
But you can send campaign earnings to the old address
If that's ok with you, I'd accept it this way.
How about the 1H61K address I mentioned earlier?