It looks like it was all poured at once. Maybe popped in the oven or otherwise heated around the periphery/from the outside and then chilled? I don't know if the person meant to do it or not but it is an astonishing looking soap.
I saw that one on Pinterest and was stunned! It appears to me as a mantra type swirl on top of the bars as apposed to in the middle. I can't imagine the practice this took.
I believe it is called "Circling Taiwan Swirl"
You basically do the 1st (zig zag or chevron) step of Taiwan and then you circle touching the sidef of mold a couple of times.
This was an entry in Amy's challenge this month, I'm pretty sure it will win. I think the technique is pretty well described in soapers Facebook album.