This sounds dumb to me, the whole point of bitcoin/blockchain is that you don't need another layer/trusted party on top of the settlement layer. This wouldn't eliminate fraud, it would just shift the costs to someone else, just as the current system (VISA etc.) does.

Thought through, this would reduce settlement time from the current standard of t+1 - t+3 (depending on whether SEPA/US) to 1 hour (6 confirms). Not very revolutionary as t+0 is already in planning for traditional clearing and settlement systems.