My eyes hadn't deceived me - it said "Copulation Register". I'll confess that I had never come across that term in this context so I tried to find references or meanings. I'd almost given up before I looked in Following the Paper Trail: a multilingual translation guide [a terrific book in the GSV library] and there was the ONLY reference I've found so far to a Copulation Register.
Copulation - "marriage, wedding" (from the Latin word copulatio, a coupling or coming together; only later did copulation come to have a rather more specific meaning).And those words are a direct quote from the book.
It definitely stopped me in my tracks and it proves the age-old saying ... "you learn something new every day"!