I just tried to verifiy in coinig and it seems that i does not verify it
http://coinig.com/?adr=12QykYQirkC6pwDfZuHv1CwR7qrJZ42t46&msg=This+is+Sourgummies+from+bitcointalk.org+and+today+is+2015.09.22%0D%0Aand+this+is+my+test+signature.&sig=H5nI3fUNrx%2BMxjYlc2MkP1Y8MMplPNueMkW8lTQHpZGQf6OmUlmLgvUNdwqoOylSHf0jicUACMzMqfw39RGRL30%3D
I will try now in brainwallet offline.
Edit: It works when i checked in brainwallet web archive and here it is
Message verified to be from 12QykYQirkC6pwDfZuHv1CwR7qrJZ42t46

Really appreciate the quick responses and the detailed thread,this really should be sticky for us newbies.

Works for me, might be a browser issue? I tested it with chrome latest and it worked.


Glad you like it. Its linked in the unofficial rules sticky, I try to bump it on a regular basis and a few other member have the link here bookmarked. Should be enough

thank you for this guide it was really helpful, now i know how to sign message to prove ownership

I think the easier wallet that offer this is old multibit. You can verify or write a message from the options menu.

Is it possible to sign a message with breadwallet or any other open source wallets like blocktrail or something like that?  I'd prefer to sign a message of mine that has the convenience of not having to download anything on my computer... but then again, I might need too in the long run if I plan on keeping my bitcoins safe... help

Sir how about if i want to buy account with sign message how to do?

Ask the Escrow to help you verify the message if you are not yet familiar with signing a message. Don't buy with out an escrow!

My suggestion would be to use escrow. Most sellers will not tell you the exact name of the account in advance. Thus the escrow would have to check for the oldest available address of the account and request a signed message for you.

Like I have linked an old post in my 1st post here. The address posted in Dec 2013 is still under my control. If I wanted to sell my account I could sign a message with this address saying that I freely sold it to you. That way you can proof that I indeed sold the account to you and you are now the rightful owner of the account. You dont have to reveal this signed message unless you need to. As long as nobody questions whether you are the rightful owner of the account shorena you can keep the signed message somewhere safe. Requesting a signed message should be normal for a good escrow service, but it might not always be possible.

Not everyone posted their address in the past. If there is no old address you can still request a message signed with the payment address. E.g. you buy my account and I want the payment on address 1sho... I could sign a message with 1sho... stating that I just sold the account shorena to you.

Once you have control over an account you should stake one of your addresses in this thread by tomatocage -> https://bt.irlbtc.com/view/996318.0

This enables you to sign a message in the future should you want to sell the account or if there are other issues where you need to convince someone that you are the rightful owner.