Yes, it is emulated , like Alocohol 120% can make images of such cds and mount them on a virtual cdrom and emulate the DPM so the lock checking is fooled as it is the original cd, but this is only an image file, you can not duplicate the locked cd this way. Any attempt to copy these kind of protected cds will cause the physically change in DPM so the copies won't simply pass the lock check. I have not seen also anyone cracked the lock checking routines, this can give us a generic patch for the lock.

still waiting...