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: Cobo, 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)

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

Setup Cobo Vault

  1. On Specter-Desktop, select your multisig wallet (e.g. Redundant Multisig) > Settings > Show Cobo QR Code:
    Specter-Desktop will display a popup like this:

  2. Scan the QR code on your Cobo Vault:

  3. View wallet information and confirm:

Setup Coldcard

  1. On Specter-Desktop, select your multisig wallet (e.g. Redundant Multisig) > Settings > 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” (✓))


Advanced Considerations

Comfortable with the concepts in this step?

Read the advanced considerations that can potentially improve your security here.


» Next Section: Verify Receive Address