Born in the early days of General Francisco Franco's dictatorship, Blasco went to primary school at the Samaniego and Jesús Obrero de Vitoria colleges.

From this time forth, Blasco's career was heavily bound to the cinema, and he repeatedly worked with more than one director, Julio Medem, Pello Varela or Montxo Armendáriz.

In 1992, he gave up his accountant's job at Aranzabal to give himself over wholly to his acting career, taking part in this decade in Alas de mariposa ("Butterfly Wings"), Vacas ("Cows"),[7][8] Los años oscuros ("The Dark Years"), La ardilla roja ("The Red Squirrel"), Cómo ser infeliz y disfrutarlo ("How to Be Unhappy and Enjoy It"), Sálvate si puedes ("Save Yourself If You Can"), Salto al vacío ("Jump into the Void") or Cuernos de mujer ("Woman's Horns").

In the 2000s, Blasco appeared in the films Maestros, Leo, Aunque tú no lo sepas (literally "Although You Never Knew It", but entitled "What You Never Knew" in English) and Para que no me olvides (literally "So That You Don't Forget Me", but entitled "Something to Remember Me By" in English), and in various series such as Paraíso, Robles, investigador, Policías, en el corazón de la calle, Un lugar en el mundo, Hospital Central and TVE's Cuéntame cómo pasó, in which he spent three years.

In the 2010s, Blasco appeared in many television series, among which were Águila Roja, Los misterios de Laura, Gran Hotel, Aída, Con el culo al aire and Rabia.