How You Prove Ownership

Polymarket uses EIP-712 signatures - an Ethereum standard for typed data signing:

// You sign this message to prove wallet ownership
{
  address: "your_wallet_address",
  timestamp: "current_time",
  nonce: 0,
  message: "This message attests that I control the given wallet"
}

This signature:

• Proves you own the wallet

• Derives your trading API credentials

• Never exposes your private key