A lot has been written about blockchain's ability to change the infrastructure of financial institutions and the manner in which money moves around the world----but can it also be used for a greater good for a society? Hundreds of startups are racing to make the blockchain more secure and scalable, with the ultimate goal of having a greater impact on consumer safety. TechCrunch explores those startups that are using blockchain's underlying technology to authenticate art, track pharmaceuticals throughout the supply chain, and combat counterfeiting of luxury goods and accessories.