Minor nitpick as a former journalist - being on the record means not being anonymous, and being anonymous means being 'off the record' (the 'record' refers to your name, not your comments).

If you're really interested, there are kind of four loosely defined categories of sources: On the record (quote and name me), Off the record (quote me, but don't name me), Background (Don't quote me, but use this information to verify other research) and Deep Background (this will point you in the right direction, but you'll need to verify with multiple other sources). As I said - loosely defined, but on/off the record is pretty clear.