Update README.md

README.md

@@ -5,7 +5,7 @@
 
 Copay is an easy-to-use, open-source, multiplatform, multisignature, secure bitcoin wallet platform for both individuals and companies.  Copay uses [Bitcore Wallet Service](https://github.com/bitpay/bitcore-wallet-service) (BWS) for peer synchronization and network interfacing.
 
-Binary versions of Copay are available for download at [Copay.io](https://copay.io/#download).
+Binary versions of Copay are available for download at [Copay.io](https://copay.io/#download). Copay Binaries are signed with the key copay@bitpay.com [See here for details](#How-to-verify-Copay-signatures)
 
 ## Main Features
 
@@ -143,6 +143,57 @@ We release bug fixes as soon as possible for all platforms.  Usually around a we
 - t+7: iOS is submitted for 1.2.1. All other platforms are submitted with auto-release off.
 - t + (~17): All platforms 1.2.1 are released when Apple approves the iOS application update.
 
+## How to verify Copay signatures
+
+ 1. Download copay@bitpay.com public key (`gpg --recv-keys 1112CFA1`)
+ 1. Download Copay binary ($FILENAME) and signature file ($FILENAME.sig)
+ 1. Check it by running:
+``` bash
+$ gpg --verify \
+ $FILENAME.sig \
+ $FILENAME
+
+# If should say:
+ "Good signature from "Copay (visit copay.io) <copay@bitpay.com>"
+``` 
+
+### Public Key for Copay binaries
+Instead of importing the public key from a public server (like gnu's) you can grab it from here:
+
+```
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: SKS 1.1.5
+Comment: Hostname: pgp.mit.edu
+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+=tKra
+-----END PGP PUBLIC KEY BLOCK-----
+```
+Save that text to /tmp/key, and then import it as follows:
+```
+gpg --import /tmp/key
+```
+(Thanks @pzkpfwVI and @mika-mitzahlen for this section, taken from [Gist](https://gist.github.com/matiu/61c9f529efeeba66c0e2).
+
+
 ## Support
 
 * [BitPay Labs](https://labs.bitpay.com/c/copay)