Collectibles app makes it possible to use the NFC capability of the smartphone to read and verify the authenticity of Ethereum-based NFTs embedded in the chip of smart cards or NFC-enabled goods. The chip contains cryptographic information about its associated NFT, including its symbol, identifier and the corresponding private key. This information has been provided by the issuing party, and will be cryptographically stored on the Collectibles App after declaring new ownership on the Ethereum mainnet.