Jerry Day Concert Poster Chris Peterson Signed A/P San Francisco 2018. Jerry Day Concert Poster. Celebrating the Life of Jerry Garcia. Haight Street Art Center. Designed & Signed by Chris Peterson. Numbered Artist Proof by Chris Peterson. What is an Artist’s Proof? An Artist’s Proof is an old tradition of reserving a quantity of prints for the artist’s use, printed at the same time as the regular edition without changes. In the early days of printing, these prints were the only remuneration the poor artist received. At visiblevibrations, we only sell ORIGINAL Concert Posters, Art Prints, Music Memorabilia and Limited Edition Art Toys!