Function operating on header

[Noeck]

Hi,

I would like to populate header fields based on other header fields
(copyright based on author is just an example):

\version "2.20.0"

\header {
  author = "Name"
}

% call a function here equivalent to writng
\header {
  copyright = #(string-append "© " "Name")
  % where "Name" is the author field from above
}

{ a }

Is that possible?

Cheers,
Joram