Plain answers about proving you own a crypto wallet: how wallet signatures work, how to sign with the wallet you have, what is safe to sign, and how anyone can check the result without trusting us.
How to prove you own a Bitcoin address
Sign a message with the address's key: free, instant, nothing on the blockchain.
How to sign a message with a Bitcoin wallet
Step by step in Xverse, Electrum, Sparrow, Trezor, Ledger and Bitcoin Core.
BIP-322 vs BIP-137: Bitcoin message signing explained
Why there are two formats, which wallets use which, and why Taproot needs BIP-322.
How to prove you own an Ethereum wallet
One signed message, no gas, and it covers every EVM network at once.
How to prove you own a Tron (USDT) wallet
Sign a message in TronLink: no transaction, no TRX burned, works for USDT addresses.
Is it safe to sign a message with your wallet?
How to tell a harmless message from an approval or permit in disguise.
Proof of wallet ownership: what it is and who asks for it
Who asks for it, the common methods compared, and what makes proof easy to check.
How to check a wallet certificate yourself
What the certificate page checks, and how to verify both signatures without us.
Looking for which wallet to install? See the wallet guide.
Get a certificate for your wallet in about two minutes.