Present day denial seems sensible to me so as not to scare off investors who still hold the belief this company is tenuous at best.
Bombardier is now on the record that the CS500 is not currently being considered.
It has been reported in the Gazette, Bombardier have copyrighted CS500 and are allowing for the 'possibility of a larger C series.
I think you mean "trademarked" instead of "copyrighted".
But Bombardier abandoned the trademark in 2014, when it became clear that the CS500 will not be forthcoming:
Canadian trade-mark data: 1425349 - Canadian trade-marks database - Industry Canada