Air-Gapped Bitcoin Signing with Coldcard and Sparrow

Set up a fully air-gapped Bitcoin signing workflow using Coldcard Mk4 and Sparrow Wallet over PSBT — no USB data connection required at any point.

~60 min

Prerequisites: Coldcard Mk4, Sparrow Wallet installed, microSD card

GEEKrar

Apr 14, 2025

Before you start

Estimated time~60 min

PrerequisitesColdcard Mk4, Sparrow Wallet installed, microSD card

DifficultyAdvanced

TopicWallets

Full guide content coming soon

Step-by-step instructions, screenshots, and tips will appear here once published.

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