How do you find out if my painting of nostalgic summer by Eric sloane is an original?

To determine if your painting of "Nostalgic Summer" by Eric Sloane is an original, you can start by researching the artwork's provenance, which includes its history of ownership. Look for any certificates of authenticity, gallery records, or auction house documentation that may accompany the painting. Consulting with an art appraiser or expert in Eric Sloane's work can provide additional insights. Additionally, examining the painting's style, materials, and signature can help confirm its authenticity.