How to sign a message?!

[Roman_P]

-----BEGIN BITCOIN SIGNED MESSAGE-----
this is Roman_P from bitcointalk.org and today is  2018.01.25
------BEGIN SIGNATURE------
18QQn1UkKxCHebubqCA9EbLQYUtDHuL7tD
H0pMkatMVtGwHfW65xibNc1apK4BK+/UsBayN4H4OHiiHnckI7C0DPBYr5vnhqojAcPXslUxPooI3Mfu9678ffA=
------END BITCOIN SIGNED MESSAGE--------

[1714815746]

1714815746

[LTU_btc]

-----BEGIN BITCOIN SIGNED MESSAGE-----
This is g4vinshreds from bitcointalk.org and today is January 25th, 2018.
-----BEGIN SIGNATURE-----
IIh1Q6cbR5oJbozTqJm2B4B7mFETIeDoyjUKxDz6+pPnZBYj8opo1hp2r5mNS/ATvXi2Y+aJ1JlJqt5PO6CD4n4=
-----END BITCOIN SIGNED MESSAGE-----

You forgot to add Bitcoin address to your message, so it's not possible to verify it.

-----BEGIN BITCOIN SIGNED MESSAGE-----
this is Roman_P from bitcointalk.org and today is  2018.01.25
------BEGIN SIGNATURE------
18QQn1UkKxCHebubqCA9EbLQYUtDHuL7tD
H0pMkatMVtGwHfW65xibNc1apK4BK+/UsBayN4H4OHiiHnckI7C0DPBYr5vnhqojAcPXslUxPooI3Mfu9678ffA=
------END BITCOIN SIGNED MESSAGE--------

Quoted and verified
http://coinig.com/?adr=18QQn1UkKxCHebubqCA9EbLQYUtDHuL7tD&msg=this+is+Roman_P+from+bitcointalk.org+and+today+is++2018.01.25&sig=H0pMkatMVtGwHfW65xibNc1apK4BK%2B%2FUsBayN4H4OHiiHnckI7C0DPBYr5vnhqojAcPXslUxPooI3Mfu9678ffA%3D

[NEEDHELP6]

I Have a Coinbass bitcoin address added to my account. Can i signed and verify my address some how?

[shorena]

I Have a Coinbass bitcoin address added to my account. Can i signed and verify my address some how?

AFAIK you cant.

[NEEDHELP6]

I Have a Coinbass bitcoin address added to my account. Can i signed and verify my address some how?

AFAIK you cant.

Sir, i have a ether address i have posted and added to my account. can i signed with it?


Edited: https://bitcointalk.org/index.php?topic=2192440.msg22624638#msg22624638

[MKH]

How can I sign a message in the new blockchain?It seems I can't find a sign button there,I've only seen the verify one.It's not in the manage options.

By blockchain I assume you are referring to blockchain.info

To sign a message, go to the "Settings" tab on left, Click on "Addresses", Click on "More Options" in front of your required address, Choose "Sign Message" .

Does the new version allow signing messages? My last info is only the old wallet version does.

Yes it does allow signing.
I don't use blockchain.info much, but the steps above do work for latest version too ! I checked yesterday only.
It's here :

You may update the OP 

I import address and click on more options but its don't showing sign Message. It's showing Archive, Transfer, Spend.

[MKH]

-----BEGIN BITCOIN SIGNED MESSAGE-----
Hi I'm MKH. I'm Signing This Message As a Test Message. and today is  2018.02.07
------BEGIN SIGNATURE------
14xE7pNigaxGdH2WmCp5NA3PnpvDWTXbWx
Hw0w5BhNb9E5uN1PIR/quKEXqxcjeVtwpCkziE0D3UVuUliVwfXUy+3uUdxEa88cfUfK7dPNLkj8gIjNgTRkDlQ=
------END BITCOIN SIGNED MESSAGE--------

[InvoKing]

-snip-

As you was told in the other topic, you made a mistake when copying the text, i found an extra space between "is" and "2018" but even removing it doesn't help. Try to verify the message then post it again.

[MKH]

-snip-

As you was told in the other topic, you made a mistake when copying the text, i found an extra space between "is" and "2018" but even removing it doesn't help. Try to verify the message then post it again.

Yes sir i Corrected This one. can you verify this one now.

Code:

-----BEGIN BITCOIN SIGNED MESSAGE-----
Hi I'm MKH. I'm Signing This Message As a Test Message.
------BEGIN SIGNATURE------
14xE7pNigaxGdH2WmCp5NA3PnpvDWTXbWx
Hw0w5BhNb9E5uN1PIR/quKEXqxcjeVtwpCkziE0D3UVuUliVwfXUy+3uUdxEa88cfUfK7dPNLkj8gIjNgTRkDlQ=
------END BITCOIN SIGNED MESSAGE--------

[InvoKing]

-snip-

As you was told in the other topic, you made a mistake when copying the text, i found an extra space between "is" and "2018" but even removing it doesn't help. Try to verify the message then post it again.

Yes sir i Corrected This one. can you verify this one now.

Code:

-----BEGIN BITCOIN SIGNED MESSAGE-----
Hi I'm MKH. I'm Signing This Message As a Test Message.
------BEGIN SIGNATURE------
14xE7pNigaxGdH2WmCp5NA3PnpvDWTXbWx
Hw0w5BhNb9E5uN1PIR/quKEXqxcjeVtwpCkziE0D3UVuUliVwfXUy+3uUdxEa88cfUfK7dPNLkj8gIjNgTRkDlQ=
------END BITCOIN SIGNED MESSAGE--------

Ok done . You only need to verify it once with the same Bitcoin address

[pandukelana2712]

~snip~

I import address and click on more options but its don't showing sign Message. It's showing Archive, Transfer, Spend.

Based my thread in my local sub https://bitcointalk.org/index.php?topic=2946861.0, I'll make this thread more completly with this, especially how to make sign messages bitcoin address at blockchain.info wallet


Question : If there is already a thread about that, why did you created this thread man? Are you wanted to spam or something?! Go away!
Answer : No dear, certainly I'm not. I did this because Shorena still didn't give detail a tutorial on how to sign a message with new version blockchain wallet.
Lucky me, I've already tried it and it was successfully verified!

Hi, please verify my address

Code:

----BITCOIN ADRESS ----
1N41sxCmuHe2uWVmL29aJc5KkkCVAVZ5AK
-----BEGIN BITCOIN SIGNED MESSAGE-----
Today is 13.02.2018 bitcointalk account pandukelana2712 (u=1304130) belongs to this address
-----BEGIN SIGNATURE-----
H+sS1GVZ0zmbcLq+qjRr6QIeMXWaTUFl2BfzOObkzEQqa0E6MCGFeGBNzNadoKBL7Ag2XKSYxBrXUBVtfFfKdQg=
-----END BITCOIN SIGNED MESSAGE-----

Thanks.

Quoted and verified!

Step 1
Login to your blokchain wallet just as usual blockchain.info.
Make and copy your private key to notepad. Follow cissrawk tutorial on https://bitcointalk.org/index.php?topic=2107937

Step 2
After you got your private key, go to blockchain.info
choose menu ==> setting


Step 3
Choose address sub menu


Step 4
Click Import Bitcoin Address button


Step 5
Fill it with your private key, then click import


Step 6
After you've done succesfully don that, then your address will be shown just like in number (5), choose more option


Step 7
Choose sign message


Step 8
Make sure your adress and your message match with your account on bitcointalk, make sure to include the date when you sign it too


Step 9
If you've successfully done it, you will see something like this


EDIT:
For some reason, I'm not suggest you to use blockchain.info as your main wallet.
This is just tutorial, how to make signature message at b.info wallet.

[HCP]

Anyone know if I can sign Bitpay or Copay address? I have the private keys but I wonder if it is possible to sign these wallets. THANKS

If it starts with a "3"... then the answer is no. You can ONLY sign from addresses that start with a "1".

[HCP]

If it starts with a "1" and you have the private keys you can definitely sign a message using that address... it is probably just that Bitpay and CoPay don't provide the functionality within their wallets.

You would need to use another wallet like Electrum (https://electrum.org/#download) and import your private key and use the inbuilt tool for signing messages... Apparently b.info also offers this for imported keys, but I don't like b.info

Or you'd need to use an external tool like "brainwalletx" (http://brainwalletx.github.io/#sign)... NOTE: I DON'T vouch for the safety of using "brainwalletx" and I certainly wouldn't use their website to input a private key... At the very least you should create an "offline copy" of it (download .ZIP and run locally while OFFLINE etc).

[InvoKing]

If it starts with a "1" and you have the private keys you can definitely sign a message using that address... it is probably just that Bitpay and CoPay don't provide the functionality within their wallets.

You would need to use another wallet like Electrum (https://electrum.org/#download) and import your private key and use the inbuilt tool for signing messages... Apparently b.info also offers this for imported keys, but I don't like b.info

Or you'd need to use an external tool like "brainwalletx" (http://brainwalletx.github.io/#sign)... NOTE: I DON'T vouch for the safety of using "brainwalletx" and I certainly wouldn't use their website to input a private key... At the very least you should create an "offline copy" of it (download .ZIP and run locally while OFFLINE etc).

Importing private keys to latest version of electrum is safe tho but i wouldn't recommend doing the same for brainwalletx nor for B.info even if it is proven to be safe for the last one.
Avoid online sites when you are dealing with sensitive informations.

[Rimon365]

Code:

-----BEGIN BITCOIN SIGNED MESSAGE-----
Hi I am Rimon365.This is my message.Today is Fabruary 26, 2018.
------BEGIN SIGNATURE------
1PA6ohpFBB7n49DubLAynzrnMWqzoZmgAg
H4ASyjrVjA7Co3NO1KYeCENDHs5NRftec4bZOggEiIbsFi1lEYLR6B8jXS0Tt7ZbsCiVRZeKQbi+kK2Qm/SC5tA=
------END BITCOIN SIGNED MESSAGE--------

Please quote and verify this message.

[LTU_btc]

Code:

-----BEGIN BITCOIN SIGNED MESSAGE-----
Hi I am Rimon365.This is my message.Today is Fabruary 26, 2018.
------BEGIN SIGNATURE------
1PA6ohpFBB7n49DubLAynzrnMWqzoZmgAg
H4ASyjrVjA7Co3NO1KYeCENDHs5NRftec4bZOggEiIbsFi1lEYLR6B8jXS0Tt7ZbsCiVRZeKQbi+kK2Qm/SC5tA=
------END BITCOIN SIGNED MESSAGE--------

Please quote and verify this message.

Quoted and verified

[JeremyB]

shorena thanks for your helpful post!
I translated it in French here: https://bitcointalk.org/index.php?topic=3022163.new#new, if you want to add the link in the translations.

I've added 3 sections you could be interested to add in the OP:
- Sign with a Ledger Nano S
- Sign with a Trezor
- BrainWallet BitCore signature verification
- Trezor signature verification




Ledger Wallet Bitcoin v.1.10.1
return toindex

Link to picture -> https://i.imgur.com/2h22aN6.png



Verified here.
Note: Ledger Wallet Bitcoin can't be used to verify a signature.

Trezor Wallet
return toindex

Link to picture -> https://i.imgur.com/mvg884g.png



Signature verified with Trezor here


(Bitcoin-QT) Correct Signature


Link to picture -> https://i.imgur.com/hlkBkji.png

(Bitcoin-QT) Incorrect Signature


Link to picture -> https://i.imgur.com/VEqKAeE.png

(Bitcoin-QT) Correct Signature & Missing address


Link to picture -> https://i.imgur.com/LefpKPC.png


Trezor
return to index

Correct Signature

Link to picture -> https://i.imgur.com/XgICUy7.png


Incorrect Signature

Link to picture -> https://i.imgur.com/Y3LIVPT.png

[shorena]

Added a sentence to the chapter "Pay to script hash (P2SH) addresses":

With the addition of P2SH-P2WPKH addresses (SegWit, but starting with a 3) this did not change. At least it did not in bitcoin core, other wallets may still allow signing or verification.

[uelque]

Hope I did it right! Signed a message using Electrum.

Code:

-----BEGIN BITCOIN SIGNED MESSAGE-----
This is uelque from bitcointalk.org and today is 2018.03.03
-----BEGIN SIGNATURE-----
16Uh382NnXkCP1w7qGuEL6T9hufHKpbRcP
IJRlldK4NzLjoDS0rIcTDgLIJBZaOnS9s3jUxZb4tOAMMU2AAAnIpz3LAMPLMb6+W1mm6tL7DsOyW15tulY3664=
-----END BITCOIN SIGNED MESSAGE-----

[shorena]

Hope I did it right! Signed a message using Electrum.

Code:

-----BEGIN BITCOIN SIGNED MESSAGE-----
This is uelque from bitcointalk.org and today is 2018.03.03
-----BEGIN SIGNATURE-----
16Uh382NnXkCP1w7qGuEL6T9hufHKpbRcP
IJRlldK4NzLjoDS0rIcTDgLIJBZaOnS9s3jUxZb4tOAMMU2AAAnIpz3LAMPLMb6+W1mm6tL7DsOyW15tulY3664=
-----END BITCOIN SIGNED MESSAGE-----

Could verify it, well done.