That is a very attractive flower. I would enjoy having blooms like that in my collection, nice growing and nice photos.
The dorsal says to me Paph lowii, the petals say haynaldianum, in many ways this flower looks like Paph Tony Semple (haynaldianum x lowii). I would check with your supplier. Unless he can show you a well documented provenance, that goes back to its source in the wild, I would doubt that this is really a species. My guess it is a hybrid, that either accidentally or possibly deliberately has been mis-identified as a species. It is possible the hoax was perpetrated by the source who supplied your supplier, so it may be that your supplier really believes this is haynaldianum.
Mix ups happen all the time with orchids. Lost tags, tags pulled out of pots by persons wanting to read the tags, then sticking the tag back in the wrong pot. (I have had more than one visitor do this to me),people not remembering correctly what their source told them about a plant's origin. A vendor, wanting to make the sale exaggerating or being less then clear about the origin of a plant. The end result is that it is sometimes well meaning people sell a plant with an incorrect name.
Perhaps Olaf Gruss would weigh in as to his thoughts about the identity of this orchid.