terminal spike+root problem

[highwar]

hello
I have a half year phalanopsis which has terminal spike.
When I first bought it it was in coco husk media and I changed it to bark sicne the roots started to rot.
it has 4 good air roots - two of them I put in the media to help the orchid. About the other roots- I have 6 roots which are good.

But as you see in the picture the lower stem is black and dry BUT not mushy (it doesnt rot)

What are those spots on the stem ? new roots ?
do you think it will make a basel keiki or not ?


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