John Lennon's son Julian is selling a collection of Beatles memorabilia as a set of non-fungible tokens (NFT).

The centerpiece of the "Lennon Connection" is some notes jotted by Paul McCartney while writing "Hey Jude," one of the Beatles' most famous songs. The song was said to be penned by McCartney to comfort the young Julian during his parents' divorce.

The collection also includes clothing worn by John Lennon in the Beatles' films and various guitars given to Julian Lennon by his father. The NFTs take the form of audio-visual collectibles, each accompanied with narration by Julian.

The auction will take place on NFT marketplace YellowHeart on Feb. 7. YellowHeart is a startup that uses Ethereum and Polygon integrations to offer tickets and other music-related items as NFTs. Last March, it hosted the release of Kings of Leon's album as an NFT, a first for a rock band.

NFTs saw a dramatic surge in interest in 2021, with trading volume reaching $10.7 billion in the third quarter, driven by a record-breaking August that saw over $5.2 billion in trading.

The availability of NFTs related to the Beatles, one of the most iconic rock bands of all time, may trigger renewed attention toward the use of the technology for the sale of music-related memorabilia.

Julian is not the first member of the family to be associated with crypto and blockchains. His half-brother Sean Ono Lennon has made himself known as a bitcoin advocate, saying in a podcast in November 2020 that the world's largest crypto is "one of the only things" that gives him optimism about "the future and humanity in general."

Read more: Music NFTs Are Set for an Explosive 2022