Hey, thanks for the comments! We don't think it's a matter of verification / financial incentives for the blockchain use case, but instead, it's the censorship-resistant, permissionless, and spam prevention factors that count. If we had a centralized database, we could potentially limit access or overwrite records.

As far as discovery goes, we've developed a product that helps with exactly this problem - it's called Chainquery. It digests all the metadata from the blockchain into SQL tables that can be easily queried. Check it out at https://github.com/lbryio/chainquery/