To safeguard the integrity of product information, we upload it to the Blockchain and establish a platform for verifying the information at the point of purchase. If the product is not time-sensitive, we can utilize a product attribution mechanism. This means that after a sale, the store will re-upload the product onto the Blockchain for the purchaser, along with their customized PIN code and the product's hash value. This way, when checking the record later, the owner of the product can be identified.