I came to the conviction that digital artworks, any form of digital property, really, needs a public clearinghouse.

You simply shouldn't be allowed to sell any digital license for a product you didn't register at that clearinghouse before. The task of that clearinghouse would be to provide the customer with the bought content in case of dispute or any other problems. So if, e.g, Amazon goes out of business, all my books would be available for me to download from said clearinghouse because I own the license. Same for steam games or Disney videos.

Many (but not all) of the problems with DRM or copyrighted works would vanish if we established this legal requirement.