...a series of scratches toward the inside of the disc.
But in my audio CD player, it reads the disc just fine.
That looks pretty minor. I'm betting there are at least some drives that will be able to read this.If not, polishing should fix the problem. Feel free to search the forum for previous discussions on the topic.
If it is/were the TOC, try a ripper which is capable of ripping copy-protected CDs.