https://brainwallet.bchtools.app/#verify works for:
-----BEGIN BITCOIN SIGNED MESSAGE-----
Address 16cou7Ht6WjTzuFyDBnht9hmvXytg6XdVT does not belong to Satoshi or to Craig Wright.
Craig is a liar and a fraud.
-----BEGIN SIGNATURE-----
16cou7Ht6WjTzuFyDBnht9hmvXytg6XdVT
G39S6i4XsfQnixN5ePMjVPboWvGXdnW8xFFAXiwEriZFCclflbD7umP58u3Sl+dvvXC5BxBrRNkTMNf92O1UIXw=
-----END BITCOIN SIGNED MESSAGE-----
However, https://github.com/libbitcoin/libbitcoin-explorer/wiki/bx-message-validate seems to fail for the monumental test vector above.