post https://api.zan.top/node/v1/btc/mainnet/
verifymessage "address" "signature" "message"
Verify a signed message
Argument #1 - address Type: string, required
The bitcoin address to use for the signature.
Argument #2 - signature Type: string, required
The signature provided by the signer in base 64 encoding (see signmessage).
Argument #3 - message Type: string, required
The message that was signed.