Judging from your pictures I’d say the dark ring is in fact burnt, but perhaps not very well. This is a classic result of a 16x burn not going so well.
Your media is CMC made Verbatim MCC03RG20. I’d personally burn @ 8x instead or even 12x. Your writer is not the newest 16x drive either so this would partly be an issue.
You can go with TY but you might not get good results with that either. I personally have not gotten great results with TYG03, dunno about T03. 16x burning is very hit and miss. You need a disc that always has good batches. I personally have had Verbatim MCC004 that burnt great even @ 16x. Then other spindle don’t go well @ 16x at all.
They all burn fine @ 8x though. Depends what matters to you the most. Write quality or speed? If you want good write quality all the time and reliable results, you honestly need to forget about 16x burning. If your car can rev out to 7000RPM, does that mean you should constantly rev the engine to 7000?