About the Positioning of centrifuge

I do not think the concept of asset origniator is great.
Maybe I have neglected something important.
Skining in the game and undertaking first loss is not enought for AOs.
Like P2P finance in traditional finace, numerous enterprises has bankrupted in the world because of the nonexistent and forged collaterals.
So I suppose the positioning of centrifuge should be a protocol which tokened real-world assets onto public chain.
Like chainlink which uploads the data from real world onto public chain and disables informational supplier to plagiarize each other, centrifuge should be responsible for the authenticity of the real-world collaterals.

How to attest the authenticity of the collaterals?
How to prove the collaterals wasn’t pledged in other institutions?