Your wallet configuration file allows you to access your bitcoin outside of your Unchained account. This means you aren’t dependent on Unchained, and you can recover your bitcoin with the necessary keys even in the unlikely scenario that something happens to Unchained or our website.
If someone else gets your configuration file, they could see the balance of your vault and your transaction history, but they could not steal any bitcoin if your keys remain protected. Learn more about how to protect your multisig config file.
If you are using one or more Ledger or Coldcard, you should go through a brief registration process for each device. This teaches your hardware wallet that it’s involved in a multisig wallet. Trezor doesn't require this step.
Select Register devices in the Vault tools menu, or within the light blue banner on the top of your vault, then choose your device.
Unlock your Ledger with the PIN, navigate to the Bitcoin symbol, and press both buttons. Your Ledger should say Bitcoin is ready.
On Unchained, select Next.
On your Ledger, press both buttons to begin the registration process.
Use the right button to find Approve and then press both buttons. There will be several approvals for you to complete.
If you have more than one device to register, proceed to register the other device.
Select the Download Coldcard file button. Ensure your MicroSD card is connected to your computer, and then move the downloaded file onto the MicroSD card.
Unless you have an older model such as a Coldcard Mk3, you can use your Coldcard with a direct connection to your computer rather than a MicroSD. See our guide to ensure you have the correct settings enabled for your Coldcard.
Eject the MicroSD card and insert it into your Coldcard.
Continue to select the OK button as the Coldcard asks if you’d like to save a new multisig wallet, and shows the default name (vault ID).
Eventually the Coldcard will indicate that it has saved the information, which means it’s successfully registered!
If you have more than one device to register, proceed to register the other device.