I heard about this thread during the week and have no idea who Mr Wiseman is.

I have been singing Ride On for some time I know but certainly not since 1968 (I was far too young ).

Christy Moore's version was the first one I ever heard. When I do perform it I credit it to Jimmy MacCarthy.
I have Jimmy MacCarthy's album which was recorded in 1989/90 and dated 1991 ' The song of the singing horseman' which includes Ride on. (As written, arranged and produced by Jimmy MacCarthy).

I also have the 1984 LP (at the time at a cost of £5.69) Christy Moore 'Ride On' and on the label Jimmy MacCarthy is credited.

Quite conclusive evidence.