...horse,.. NO, I would think it's more like notarized photocopies, whereby the Original has been seen by the Public Notary, and he will vouch that the copies that he has stamped on came from Originals which HE HAS SEEN EARLIER PRIOR TO PUTTING HIS DHOBY MARK ON THE COPIES.
Otherwise, the Original Issuing organization will need to issue another set of Originals for the CHC, and I guessed this is where we need to contact the earlier organizations, be they universities, or colleges, etc,... but again, provided that they are still in existence.
Again, I am open to corrections from other forummers,....