Methods and systems for authenticating physical products via near field communication tags and recording authentication transactions on a blockchain

A method for authenticating physical products via near field communication (NFC) tags and recording authentication transactions on a blockchain, the method comprising:

• receiving, by an application executing on a first computing device, from an NFC reader, a unique identifier of an NFC tag physically connected to a product;
• storing, by a second computing device, in accordance with a smart contracts protocol, an identification of the product and the unique identifier of the NFC tag on a block in a blockchain;
• receiving, by the second computing device, from a third computing device associated with a first user, a request for a determination of authenticity of the NFC tag;
• requesting, by the second computing device, from the blockchain, an indication of whether the unique identifier of the NFC tag is stored in association with the identification of the product and an indication of ownership indicating whether the unique identifier of the NFC tag is associated with an owner associated with a blockchain address;
• receiving, by the second computing device, from the blockchain, confirmation that the unique identifier of the NFC tag is stored in association with the identification of the product and the indication of ownership indicating whether the unique identifier of the NFC tag is associated with the owner associated with the blockchain address;
• and
• providing, by the second computing device, to the third computing device, the confirmation, the identification of the product, and the indication of ownership.