TORONTO -- A new craze is sweeping through the art world, but it’s of solely digital work.

Using blockchain technology -- which is what underpins cryptocurrency transactions like Bitcoin -- to authenticate who owns the pieces, digital assets known as “non-fungible tokens,†or NFTs, are selling for millions.

An NFT is a singular, one-of-a-kind digital token that cannot be interchanged with other tokens – which makes them optimal for buying and selling art or other collectibles as .

NFTs give a digital certificate of ownership to buyers to prove authentication of both the work and the purchase, but does not give buyers the original file or copyright – which is why NFTs have been labeled as a purchase.

Canadian Trevor Jones, who lives in Scotland, sold more than $3 million worth of digitally-authenticated versions of his painting “Bitcoin Angel†in just seven minutes.

“It’s crazy how fast this space is moving,†Jones told Â鶹´«Ã½. “This is the first time in history that an artist could monetize digital pieces.â€

A version of the “nyan cat meme,†where a pixelated cat with the body of a Poptart flies over a rainbow, sold for US$590,000 at auction, and a 10-second video clip by digital artist “Beeple†sold for US$6.6 million.

Canadian musician Grimes recently sold US$6 million dollars worth of NFTs as well.

Even the NBA is getting in on the action – with the biggest transaction to date on Feb. 22, when a user paid US$208,000 for a video of a LeBron James slam dunk.

Auction house Christie’s has recently moved into the digital space, offering a new Beeple piece on the block. NFTs have surged in popularity during the COVID-19 pandemic as more and more people purchase items digitally due to lockdowns and stay at home orders.