An EVM, Solana, Bitcoin or Tron wallet you control, or make one with your email below. Not an exchange address.
About two minutes, start to finish.
One free signature. No gas, no transaction, nothing moves.
A card for a one-time payment, handled securely by Stripe.
Checkout was cancelled. You can sign again below whenever you're ready.
Not sure which wallet you have, or need one? See the wallet guide.
Your wallet has more than one Bitcoin address. Pick the one you want to prove you own; each certificate covers one address.
A single-key address you hold the keys to. Multisig and exchange addresses can't sign.
- In your wallet, open Sign message (Electrum: Tools → Sign/verify message; Sparrow: Tools → Sign/Verify Message).
- Choose the address above, paste this message exactly, and sign.
- Paste the signature it gives you below.
The message is valid for 30 minutes. If it runs out, press Continue again for a fresh one.
Signing is free and can't move funds. Payment is handled securely by Stripe. You must be 18 or over; see our Terms.
+ any EVM network