Just for the sake of reference: I tried (and failed) to create an on-chain registry of smart contract audits in 2008 as a part of SolidStamp service. Some of my learnings and ideas are still available at:
https://medium.com/@SolidStamp/solidstamp-putting-skin-in-the-blockchain-game-6c061cd33c6
https://medium.com/@SolidStamp/solidstamp-a-flight-recorder-for-the-ethereum-ecosystem-7a6247947733
Good luck this time.