Musician Grimes has sold several pieces of digital artwork at auction, raising a total of $6m - and their new "owners" do not own the work itself, meaning it can still be seen and shared online.
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Grimes is one of several artists using NFT (non-fungible token) technology to sell art.
But the art in question does not have a physical presence the same way a painting or sculpture does.
Instead, the token represents ownership - but not the work itself.
The token is recorded on a digital ledger, and can be re-sold. The artwork can go up or down in value, but the owner of the token never possesses the original digital file.
The NFT is perhaps best described as a sort of digital certificate of authenticity, and for some it's become a desirable collectible.
Last month an NFT of the 10-year-old meme Nyan Cat sold for $580,000, and a video clip of basketball player Lebron Jones went for $100,000.
NFTs exists on the blockchain - the same technology that underpins cryptocurrencies including Bitcoin - and that is how transactions are logged.
Last month the 254-year-old auction house Christie's opened its first auction of purely digital work by the artist Mike Winkelmann - also known as Beeple.
It is a collection of digital art created every single day over a 13.5-year period and is offered as a single lot.