Okay I have
CloneCD, a new Lite-On burner, a ps1 and a ps2. My firend has a ps2 /w mod chip. I can copy ps1 games perfectly with clonecd but they won't play in my ps1 or ps2 because sony put extra data on the disc in an area where normal writers can't write to. The Libcrypt is on there but those extra data sectors aren't. Now everysingle ps1 game I have copied works PERFECTLY in his modded ps2. I can't copy ps2 games because they are DVDs and I don't have a dvd writer, but I assume they would work also. I also don't have a ps2 games that are on normal cd's.
So kinda sum it all up there are 2 "protections" on Playstation 1 games. Libcrypt and that country sector code or whatever area that no writer can write to nowadays.