Hey everyone, I wanted to bring this to your attention as it seems pretty interesting to note.
We've been dumping a bunch of PS2 prototypes recently, and some of them are almost perfect matches for the final retail version. The only difference is that all the DVD-R based prototypes contain CDVDGEN metadata in each dump that contains product code, CDVDGEN version used, publisher/developer, burn date, and even information about the specific burner model that was used to author the disc (including bios version and date). This data seems to start at $7000 in each .iso dump. For instance, in the Silent Hill 2 v0.10 prototype (http://redump.org/disc/65658/), the disc contains this information starting at the offset mentioned earlier:
SLUS-20228 KCE TOKYO KCE TOKYO 20010713PlayStation Master Disc 2
Then at $7300, there's this:
HOEI DSR-8000dp 2.8fDVD-R DVR-S2012.12CDVDGEN 1.20 SLUS-20228 KCE TOKYO KCE TOKYO 20010713PlayStation Master Disc 2
I figure maybe this information might be important to note?
CD-R based prototypes seem to have something similar in a different location. For instance, in the European prototype of Polaroid Pete (http://redump.org/disc/53336/), there's this at $80b8:
SLES-50557 IREM SOFTWARE ENGINEERING INC. IREM SOFTWARE ENGINEERING INC. 20020109PlayStation Master Disc 2.0.
And this at $83B8:
SONY CD-R CDU920S 2.0c18 Jan 1996 CDW1.01 CDVDGEN 1.31
Incidentally, we discovered a second copy of this same exact prototype on another CD-R and dumping that with DICUI produced the same exact dump, byte for byte, with identical metadata as well.
Although I'm not sure if it's always CDVDGEN metadata, since I assume you could author prototypes using any kind of tool. From what I've seen, this seems to only affect PS2 games but I suppose PS1 games might be worth checking as well.
I thought I should bring this up as this might be important to note.