The rare manuscript, dated between 1830 and 1835, was found in the vault of the Morgan Library and Museum in New York by curator Robinson McClellan. While cataloguing new collections, McClellan stumbled upon the piece, which he later authenticated with the help of a leading Chopin expert. Though the waltz isn’t signed by Chopin, its handwriting features the composer’s distinctive bass clef.

While there are minor discrepancies in rhythm and notation, McClellan is confident that Chopin is the creator. "What we're most certain about is it is written in the hand of Chopin, paper that he wrote on himself in his own hand,” he explained during a BBC interview. He added, "I feel about 98% sure, and many people who heard it already feel in their gut this sounds like Chopin."

The piece exhibits unique traits, with a surprising stormy opening but a melody that resonates with Chopin’s characteristic style. Superstar pianist Lang Lang has even recorded this waltz for the New York Times, which first reported this thrilling discovery.

Chopin, who primarily composed piano solos, passed away at the young age of 39 in France in 1849. His life was marked by personal struggles, including hallucinations and suspected epilepsy, contributing to the intrigue surrounding his legacy.