Now imagine taking this gold bar to a lab and personally melting it down to test for 99.99% purity and exactly 1,000 grams weight and then molding it back into a gold bar with engraved serial numbers without reducing its purity or weight in the process. Now all do that within 10 minutes without traveling to a lab, time stamp it, and send a copy of the test results to an immutable time chain that anyone around the world can instantly view from their cell phone for free.