Real Dictionary

for the record
phrase: If you give some information for the record, you give it in case people might find it useful at a later time, although it is not a very important part of what you are talking about.
phrase: If you say that what you are going to say next is for the record, you mean that you are saying it publicly and officially and you want it to be written down and remembered.

for the record in British English
for the sake of a strict factual account