First time? The project page walks through every screen of creating a wallet — including the page whose fingerprint and first address you compare against your coordinator once the watch-only file is imported, which is how you know the file that reached Sparrow is the wallet you just made. There is also how to get and check the image, and how to write the stick.
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2. Recovery Words (13–24)
Passphrase used?
NO / YES
Circle one
If YES, keep it somewhere else – not on this sheet –
written exactly as you typed it. With the wrong passphrase
these words open a different, empty wallet, and nothing will
tell you so.
⚠️ NEVER LOSE THIS PAPER: it is the only copy. The machine
keeps none, the stick holds none, nobody can reissue it. Store it
dry, fire-safe, and away from the computer.
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1. Recovery Words (1–12)
How many words
12 15 18 21 24
Date
Master fingerprint
Wallet name
Circle your word count and leave the unused lines empty. The
fingerprint is the eight characters SignerOS shows when the
wallet is made; it is how you check later that these words are
the wallet you think they are.
⛔ NEVER SHARE THESE WORDS: whoever reads them can spend the
wallet. Type them only into SignerOS, on the offline machine –
never into a phone, a browser, or any computer that is online.
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How to use
1.
Start the offline machine.
Boot a computer from the SignerOS stick: it runs in memory
only, cannot go online, and
forgets everything at shutdown.
2.
Write the words on this sheet.
Choose Create a wallet and
copy them onto the word panels
in order, by hand. The machine then makes
you type every word back.
3.
Take the public file.
SignerOS writes a watch-only file to the
PSBT_DATA drive. Open it in Sparrow or
Blockstream Green: it can watch and prepare payments, never
spend. Check its fingerprint and first address against the
machine's.
4.
Pay someone.
That wallet saves the payment as a
.psbt file
on the stick. Choose
Sign a transaction,
check the amount and the address on
screen, then sign and carry the file back.
5.
To recover, later.
Choose Export watch-only keys
and type these words in, with your passphrase if you used
one. The fingerprint on screen must match this sheet.
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RECOVERY SHEET
SIGNEROS • OFFLINE BITCOIN WALLET
✦ 🔒 ✦
THE ONLY COPY OF
YOUR RECOVERY WORDS
Inside, hand-written, are the words that open a Bitcoin wallet.
Whoever reads them can spend it; whoever loses them loses it. Keep
it folded, keep it offline, never photograph it.
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