I’m not sure you can tell by looking at the burned surface whether a CD/DVD is stamped or done as a DVR
It was pretty obvious on the copy I looked at. I could probably photograph it clearly.
You don't see it to that extent (if at all) on a stamped disc.
Hold it so the light comes across it (tilted) .. you can see it.
"Pressing is the act of stamping out CDs at a replication house. These discs are created with a glass master, and then the CD is stamped or pressed out with the information already on the disc. Burning is the act of burning the information to the disc in a CD-R writer or burner. The visual difference between pressed and burned CDs is that pressed have the silver bottom that is all one shade. An example would be any CD you have purchased at a store, they were pressed. A burned CD-R has a change in shade on the bottom between the burned and unburned sections. Usually, the bottoms are blue or gold."
Source:
https://www.edocpublish.com/are-cd-rs-identical-to-normal-cds/