The first-ever sale by Sotheby's of "inscriptions" created using the Bitcoin blockchain's Ordinals protocol – from a pixelated collection known as "BitcoinShrooms" – drew about $450,000, or five times the highest estimates, potentially revealing a mainstream fervor for the tradable digital images colloquially referred to as "NFTs on Bitcoin."

The auction, which concluded on Wednesday, consisted of three of the images, including a pixelated avocado that fetched more than $100,000 and a design that appears to be derived from amushroom in the Super Mario franchisethat sold for north of $240,000, according to Derek Parsons, a spokesman for the auction house. There were 148 total bids across the three lots, and more than two-thirds of all bidders were new to Sotheby's.

There are "plans for more soon," Parsons wrote in an email.

The results recall the mania that swept digital-asset markets a couple years ago when digital artwork and non-fungible tokens or "NFTs" first started drawing eye-popping sums, andcaptured mainstream attention; one NFT by the artist Beeple drew $69 million at the auction house Christie's. Many of those collections, however, were built atop the Ethereum blockchain.

The Ordinals inscriptions, which debuted late last year featuring a new technology pioneered byCasey Rodarmoratop Bitcoin have witnessed bouts of popularity this year sufficient to cause congestion and elevated fees on the distributed network, launched in 2009 to be a peer-to-peer payments network.

There's adebate ragingamong Bitcoin users and developers over whether to filter out transactions in NFT-like "inscriptions" minted using the Ordinals project, since they're not a core financial use in keeping with many advocates' vision for the original blockchain.

So the idea that some of the images might be considered high art could tip the scales of the debate toward profit interests.

The digital avocado, known as "BIP39 SEED," was initially tipped to draw $20,000 to $30,000, but it ended up selling for $101,600.