Excuse my ignorance, but how do you: 2) Send your (local wallet) address and signed message to vampirus.
Is it a message on bitcointalk or a signature you generate from the command line?
If it's a command line signature can you give instructions on how to do that on the wallet?
It's a combination of both. You will sign the message with your local wallet (to proof you own the address) and send the address/message/signature via bitcointalk to vampirus. So he can verify you are the owner of this address.
1) Sign the message1.1) If you use the GUI wallet, click on "File" -> "Sign message...". A new windows will open.
- choose "Sign Message", the first line has to cointain your address, you can use the address book icon to select one (e.g.
CMmRiBwDREzDweRDPmrVLFCdyVF46MfVrv)
- type a unique message in the box below your address (e.g.
Hello vampirus, I confirm that I'm the owner of CMmRiBwDREzDweRDPmrVLFCdyVF46MfVrv. November 9th, 2017. Thank you, Dunkelheit667)
- click on "Sign Message", the signature will appear inside the third row (and a green "Message signed."), you will get an output like:
IFWq0LhAh7f9pFzZcjyyLMteqO6AL28D4kZU232/BFEEvhGJ86EkqCf1lPS+3UEofRom/CyoTgzS/tnKTnU31ws=
- you can use the icon on the right to copy this signature if needed
1.2) You can use the command line as well.
- signmessage CMmRiBwDREzDweRDPmrVLFCdyVF46MfVrv "Hello vampirus, I confirm that I'm the owner of CMmRiBwDREzDweRDPmrVLFCdyVF46MfVrv. November 9th, 2017. Thank you, Dunkelheit667"
- the response will be a signature
2) Send the address, message and signature to vampirus via bitcointalk private message.
I would suggest using the [ code ]-tag (it's the hash key in the post dialog) inside your pm, because the forum software might reformat your signature... this can cause trouble when verifying the message. Try code blocks like this for any unique address:
Address: CMmRiBwDREzDweRDPmrVLFCdyVF46MfVrv
Message: Hello vampirus, I confirm that I'm the owner of CMmRiBwDREzDweRDPmrVLFCdyVF46MfVrv. November 9th, 2017. Thank you, Dunkelheit667
Signature: IFWq0LhAh7f9pFzZcjyyLMteqO6AL28D4kZU232/BFEEvhGJ86EkqCf1lPS+3UEofRom/CyoTgzS/tnKTnU31ws=
3) HintTo get all addresses with a balance, use "Send coins" -> "Coin Control", select "Tree Mode". Each row will contain one of your addresses with a balance > 0.
I hope this helps, cheers!