[1] Coppini started his musical career in Vigo in 1980 as the lead vocalist of the group Coco y los del 1.500, alongside guitarist Miguel Costas and drummer Julián Hernández.
In 1981, Costas and Hérnandez changed the name of their other group, Mari Cruz Soriano y los que Afinan su Piano, to Siniestro Total, and added Germán as a vocalist, effectively dissolving their previous band.
With Siniestro Total, Coppini released the EP Ayudando a los enfermos, (1981) their debut album ¿Cuándo se come aquí?
After the band's dissolution Coppini started an uneven solo career, he released three LPs, El Ladron de Bagdad (1987), the 70's soul cover's album Flechas Negras (1989) and latin-infused Carabás (1996).
In 1997, he reunited again with Cardalda to release another Golpes Bajos record Vivo, but the discreet commercial response made them abandon the project soon after.
He also formed the project Lemuripop alongside Alex Brujas, releasing an album, Todas las pérdidas crean nudos (2012).
A compilation album, Huellas de una voz was also released that year, including his two first solo records and unreleased material.
He recalled, that due to the lack of cultural offers: "Living in a place as remote as Vigo in those years was awful", but with the advent of Punk in the 70s the city started changing, and he would use the little money he had saved to buy records.