windows 10 – How do I paste the Kleopatra signature into Notepad and then email so I can send it for clearsigning by a trusted time stamp service (e.g. Stamper)?

I downloaded a zip file from Medium.com with all my articles in it and signed it using a passphrase protected keypair generated by Kleopatra of Gpg4win.

When I signed the zip file called “medium-export(1)” (Type: “Compressed (zipped) Folder”; Size 284 KB) while it was still in the downloads folder of Windows 10 a new file called medium-export(1).zip (Type: “OpenPGP Signature”; Size: 1 KB) appeared in the downloads folder. The latter would seem to be a detached signature.

I want to send the signature to http://www.itconsult.co.uk/stamper.htm which is a free trusted time stamp service to have it timestamped (I was thinking of pasting it as text into an email in clearsign mode).

Stamper seems to work when I send it messages for clearsigning so I thought I’d send it the signature generated by Kleopatra. But I can’t seem to find the signature anywhere as text. When I click the signature file I get a statement saying signature verified. I don’t think I can send a file to Stamper; it has to text AFAIK.

I tried opening the signature file with Notepad but was only able to get unfamiliar symbols.
My question is: how do I paste the Kleopatra signature into an email so I can send it for clearsigning by a trusted time stamp service (e.g. Stamper)?