I think you've probably missed the IFPI codes? One of them is usually on the ringcode and written with smaller text, another one is usually pressed on the mould (sometimes only 4 symbols without the "IFPI" acronym).
From what I can see in the disc (here's a scan), I believe there's no IFPI codes or anything else in the disc.
Edit: after joining Discord and talking with sadikyo, he assisted me doing some extra research and indeed there were a code, so I gave him the details to fill in in the proper section