Abstract: A computer-implemented system and method for transparent automated data gathering flow for calculation of Gross Rating Points (GRP) ratings in compliance with European Union General Data Protection Regulation (GDPR) and to provide corresponding transparent EU GDPR compliance GRP rating reports, wherein the GRP ratings are calculated for different types of media on the same panel based on auto generated surveys without human works. The GDPR non-compliance problem in GRP calculation is solved by computer-implemented smart contract procedure using the distributed ledger as decentralized database provided by blockchain platforms supporting smart contract functionality.