Mystery surrounds the career of famous street artist Banksy, but the creators of a BBC Radio 4 podcast series may have revealed something about him: His voice.

The line “Banksy Story” includes 2005 recording which has only been broadcast in the US and which, according to the podcast’s creators, it is “discovery”.

“We assume you are who you say you are, but how can we be sure?” asks the presenter, to which the person claiming to be Banksy replies: “Oh, you have no guarantee of that.”

The quote is from the newscast “All Things Considered” of the Washington, D.C.-based NPR (National Public Radio) radio station, which aired on March 24, a few days after the artist presented works at New York’s Metropolitan Museum of Art (Met).

Listen to the podcasts here

In the discussion on NPR, the alleged Banksy, according to the Daily Mail, says that he sees himself as “painter and decorator” and claims that he likes to stick his works on the walls of institutionslike the Louvre in Paris, because “you don’t want to be stuck in the same field of work for the rest of your life, do you?”

When asked how he gets into museums and hangs his works, he answers that he was reading books about Harry Houdiniadding: “Like him I won’t go into details, but he has some good advice to offer up and coming artists I would say…”.

“Most people don’t really pay attention to things… For example, at the Met they hung a painting by Henri Matisse upside down for 42 days. I believe it stayed that way until someone told them it was wrong“, he says at another point of the interview.

In his early years, Banksy was anonymous due to the fear of being prosecuted for the graffiti he created. Now, he paints in secret to protect the air of mystery and to stay out of the limelightas noted in her publication Daily Mail.

His works, through which he often makes political statements, are presented all over the world and sold for millions at auctions.

A new Banksy exhibition has opened in Glasgow last month, at the Glasgow Gallery of Modern Art (GoMA). It is the first officially sanctioned exhibition by the unknown street art artist in over a decade.