Verify addresses and messages using public keys, addresses, and signatures!

adminApril 29, 2024

We are trying to verify ownership of a Bitcoin address using the public key, signature, and address (P2PKH, P2SH, P2WPKH, P2WSH, P2TR) as input. However, the code below does not work with Bech32 addresses.

import BitCoinLib from 'bitcoinjs-lib';
import BitCoinMessage from 'bitcoinjs-message';

BitCoinMessage.verify(message, address, signature);

As another attempt, I tried using bitcore-lib, but it doesn’t support address resolution. It accepts only the public key and signature as input.

import bitcore from 'bitcore-lib';

export function verifyMessage(publicKey, sig, text) 
    const message = new bitcore.Message(text);
  
    var signature = bitcore.crypto.Signature.fromCompact(
      Buffer.from(sig, "base64")
    );
    var hash = message.magicHash();
  
    // recover the public key
    var ecdsa = new bitcore.crypto.ECDSA();
    ecdsa.hashbuf = hash;
    ecdsa.sig = signature;
  
    const pubkeyInSig = ecdsa.toPublicKey();
  
    const pubkeyInSigString = new bitcore.PublicKey(
      Object.assign(, pubkeyInSig.toObject(),  compressed: true )
    ).toString();
    if (pubkeyInSigString != publicKey) 
      return false;
    
  
    return bitcore.crypto.ECDSA.verify(hash, signature, pubkeyInSig);

What I’m trying to achieve is similar to https://www.verifybitcoinmessage.com/, but that site also has the limitation of not being able to verify P2WPKH addresses.

Can I verify all types of addresses? If so, please provide guidance on what to do.

adminApril 29, 2024