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Prove Bitcoin Address Ownership with BitBox02 and Sparrow Wallet What You’ll Need Step-by-Step: Signing a Message 1. Access the Sign Message Tool 2. Enter Address and Message 3. Select the Format 4. Sign the Message 5. Confirm on BitBox02 Verifying and Sharing the Signature Need Assistance?

Prove Bitcoin Address Ownership with BitBox02 and Sparrow Wallet

Some services, like exchanges and brokers, may require you to sign a message to confirm ownership of a Bitcoin address. This process is similar to signing a transaction but involves no actual transfer of funds. With your BitBox02 hardware wallet, you can securely sign messages, ensuring your private keys remain protected.

What You’ll Need

Before you begin:

  • Sparrow Wallet installed and your BitBox02 wallet imported.
  • The Bitcoin address you wish to verify.
  • The exact message provided by the service requesting verification.

The message might look something like this, make sure not to change anything in it:

I confirm that I am the sole owner of this Bitcoin address. Order reference 1bd973455f.

Tip: It’s helpful to copy the address and message into a text document for easy access during the process.

 

Step-by-Step: Signing a Message

1. Access the Sign Message Tool

  1. Open Sparrow Wallet.
  2. Navigate to Tools → Sign/Verify Message or press Ctrl + M.
  3. A window with three fields—Address, Message, and Signature—will appear.

2. Enter Address and Message

  1. Paste your Bitcoin address into the “Address” field.
  2. Paste the message into the “Message” field.

Important: Ensure the message is entered exactly as provided, without any modifications.

 

Alternative: In the “Addresses” tab, right-click the desired address and select Sign/Verify Message to auto-fill the address field.

 

3. Select the Format

  1. Leave the “Format” set to Standard (Electrum).

4. Sign the Message

  1. Click Sign.
  2. Select your BitBox02 device.
  3. If prompted, unlock your BitBox02.

If you encounter an error, ensure the BitBoxApp is closed and reconnect your BitBox02. Click Rescan in Sparrow Wallet if necessary.

 

5. Confirm on BitBox02

  1. Your BitBox02 will display:
    1. The coin: Bitcoin.
    2. The Bitcoin address you’re verifying.
    3. The message to be signed.
  2. Review all details carefully. 
    1. If everything is correct, confirm the signature on your BitBox02.

Reminder: Signing a message does not involve any transaction or affect your wallet balance.

 

Verifying and Sharing the Signature

  1. After signing:
    1. The generated signature will appear in the “Signature” field.
    2. Click Verify to ensure the signature is valid.
    3. Copy the signature and provide it to the requesting service.

Caution: Do not alter the signature. Any changes can render it invalid.

 

Need Assistance?

For more information on integrating BitBox02 with Sparrow Wallet, check out our blog posts:

 

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