Blockchain is not redundant because blockchain provides non-first-party ownership authorization and would enforce the transferability of the product.

Like, right now, if I buy a digital good on a game console, my "ownership" of that good is controlled by the vendor. They can take it away on a whim, or simply because they no longer want to maintain the server that says "yes, Pxtl owns this".

If that ownership is stored on a record outside of the first-party infrastructure and the software must authenticate my ownership against that 3rd-party, then that 3rd party is the one that controls whether or not I own the software, and is responsible for keeping that service live.

And a blockchain, flawed as it is, is a decent solution for managing ownership of goods without having the infrastructure owned by a single entity who has to maintain it and can take it down on a whim.

I mean, an ICANN-style neutral 3rd party with specific policies about lifetime and transferability of ownership that just runs this on a regular-ass SQL server would be fine too.