Media serial number formats

I’ve noticed the large number of fake CDRs and DVDRs on the market these days - it seems the only way to differentiate between fakes and the “real stuff” are the serial numbers… Has anyone collected together some form of serial number formats list, maybe including which digits represent the date of manufacture, etc.?
I was just wondering, because I was thinking of throwing together a quick PHP script to verify CD-R and DVD+/-R serial numbers. In other words, feed it a disc serial number and it returns a page that gives you data on that disc - dye type, date of manufacture, manufacturer, any “special features” the disc should have (like the T-Y trademark frosted inner ring), and so forth.