Confused On Offical Audio CD's

Now Im not trying to make this sound like im a hacker or anyhting or im trying to make an offical Audio CD im just wondeirng about something.

When I put a Burnt CD on my Xbox it said it is not An offial cd or whatever somethign liek that.

All i want to know is how it reads that its burnt because if you use orginal cds on the Xbox it reads that is offical is there like a special file they put in it so the Xbox Reads that its offical.

I probally really confused you there but im hoping you understand.