Disclosed is a method and system, in FIG. 1, for verifying authenticity of specific personal data responsive to a unique wallet address (70) on a public ledger (66) of an unregulated platform (60). The wallet contains one or more non-transferable NFTs each locked to the wallet and related to specific personal data. The non-transferable NFT was minted from a regulated platform (27) to which there is a record (76) in the public ledger. Supplying the unique address of the wallet to a service supplier affects a log-in of a client (18) to the service supplier (90), whereafter message interactions over a network (12) between the service supplier and the unregulated platform (60) permits searching for a relevant (72) non-transferable NFTs (74) stored in the wallet and related to the specific personal data. Return of any relevant non-transferable NFT related to the personal data thus verifies authenticity of the specific personal data by association with a regulated platform.