INOGANDO S.L. has developed ELITER, a platform for certifying lactating cattle (ECBL) that allows the calves from dairy farms to be revalued by their purchaser. ELITER, by means of its ear tag, accredits the origin and the care that these animals have received in order to improve their traceability and marketing. The aim is to increase the existing solution with blockchain systems that allow the accreditation process to include certification bodies of recognised prestige and extend the functional model to other species and production systems.