I have a bitcoin address in my "receiving -> used" list. I need to sign a message with this to prove to an external party it is mine.
So I select sign from the drop-down menu for the address, type in a message, hit the "Sign" button and get a signature.
Great so far, except then I go to verify, paste the address and signatures in, hit "Verify" in and it just says
Error: wrong signature
I am using Electrum 1.9.7 on OSX
What am I doing wrong here? Surely the verify function should work on a signature I've just created from a key?
Please help.
Make sure you provide the address, signature, and the message (you only mentioned the first two)