Enter your keys (seed phrase) into a second hardware wallet (like seedsigner), generate an xpub with seedsigner from your keys and scan the xpub qr from your hardware wallet with your phone's wallet like bluewallet or nunchuk. You should see your transactions now in this new watch-only wallet. This is confirmation you have the correct seed words stored offline.
Discussion
So not something to try with any old wallet? Doing it watch-only seems prudent.
I *love* the idea of SeedSigner! Completely air-gap the keys. Nice.
The best route is to generate your keys with an airgapped device like nostr:nprofile1qqs09jtvjlmyrxjn37zv70a89csegcz7rpyqjmnw29cveedhv7vagqqpz4mhxue69uhk2er9dchxummnw3ezumrpdejqz9rhwden5te0wfjkccte9ejxzmt4wvhxjmcpzpmhxue69uhkummnw3ezuamfdejs92xe5k and keep your keys stored securely stamped into steel or another metal (hint, only the first four letters matter). Keep the order correct! The last two seed words contain checksum so you know if you flubbed it. Its also important to stamp in the 8-character hex checksum for most wallets. Use xpub to create watch-only online wallets to generate btc addresses to send to. Use your offline signing device to send btc out of the wallet. This way your keys never touch the internet.
Be sure to keep your computers and phones in a different room when handling your seedphrase.
I picked up on the four-character prefix. Got a favorite steel wallet kit?
Contact them directly with
They are out of office until Friday
This guy can also print up a few for you, and he'll sell you a seedsigner