New York's a no go...
I guess any David Bowie release has always been big news and this particular one has certainly been widely-reported.
One of the first to announce the forthcoming arrival of the David Bowie Birthday Celebration - Live In NYC - 1997, DVD and CD, was NME online. However, they removed the piece as quickly as they put it up once they learned it was not legit.
I wouldn't normally give these things publicity, but this release is still being generally reported as though it were official.
It seems the people behind this are the same as those that produced the Glass Spider CD and vinyl. We can't stop you buying these things, but you should be aware that they are nothing more than bootlegs and not even 'semi-legal', as they are sometimes described.
Aside from the initial broadcasts, the only official release from the January 9th 1997 David Bowie Birthday Celebration at New York's Madison Square Garden was two tracks, Little Wonder and The Hearts Filthy Lesson, which appeared on the Earthling In The City CD, (see above) given away with the November 1997 edition of the American GQ magazine.