Clearsign text document with multiple keys?

[adrelanos]

Hi,

can a plain text document be clear signed by multiple keys at the same
time? (Hold by different people.)

One can create a plain text file a, clear sign it and get a.asc. Another
one can clear sign a.asc and get a.asc.asc.

One who wants to verify it, can first verify the signature of the second
one, then the signature of the first one. Its a bit cumbersome.

Is it possible to verify the document in one run and get a list of signers?

Cheers,
adrelanos