> Unfortunately, I do not know of any "verifiers" that will accept the
above signature
Sparrow verifies this signature.
The approach used is to convert the message and signature to a public key,
trying first BIP137 and then the approach used by Electrum (they differ in
treatment of the signature
Hi Peter,
> COLDCARD makes signatures exacly like that, when told to sign with a segwit
> address:
>
> % ckcc msg -s Hello
> Hello
> bc1qzeacswvlulg0jngad9gmtkvdp9lwum42wwzdu5
> HxuuWQwjw0417fLV9L0kWbt7w9XOIWKhHMhjXhyXTczcSozGTXM4knqdISiYbbmqSRXqI5mNTWH9qkDoqZTpnPc=
>
> Unfortunately, I do not kn
