Coordinate Multisig

Now that we have all your public key information in Specter-Desktop, we need to create your 2-of-3 multisig wallet. We tell Specter-Desktop and each hardware wallet that these are your 3 public keys and that any 2 of them is sufficient to sign a transaction. This is a one-time setup that you’ll never need to repeat.

Configure Multisig Wallet in Specter-Desktop

1. On Specter Desktop, select + Add new wallet > Multisignature wallet

2. Give a name to your wallet (e.g. Redundant Multisig), choose Segwit (default), 2-of-3 (default) and select your 3 cosigners: Keystone, Coldcard and Paper Wallet

3. Select your public keys. If you’ve followed the default steps, you’ll just select all 3 of them.
   

4. See your first bitcoin address!
   (we’ll learn how to trustlessly verify addresses in the Verify Receive Address section)

r multisig w Now that we have our multisig wallet configured in Specter-Desktop, we need to let the Keystone and Coldcard devices know about it.

Setup Keystone

1. On Specter-Desktop, select your multisig wallet (e.g. Redundant Multisig) > Settings > Export > Show Keystone QR Code:
   

Specter-Desktop will display a popup like this:

1. Scan the QR code on your Keystone:
   

2. View wallet information and confirm:
   

Setup Coldcard

1. On Specter-Desktop, select your multisig wallet (e.g. Redundant Multisig) > Settings > Export > Download Coldcard File:
   

2. Save this file to your microSD card and put the microSD card in your Coldcard.

3. On your Coldcard, go to: Settings > Multisig Wallets > Import from SD
   (select the file and press “OK” (✓))

---

» Next Section: Verify Receive Address