ReceiptChain is building a universal blockchain receipt standard as well as APIs and apps to use them. These receipts will be used to track ownership and make re-selling goods more efficient for everyone.
ReceiptChain helps consumers and businesses create digital assets that survive sale and trading. These assets represent the digital identity of an object and can be used interoperably between parties or internally to track and accumulate historical records of objects such as location and owner. If you are a vendor you can register a key with ReceiptChain to give your customers mathematical proof that it started with you.