Official by Toby Fox, shown in Undertale's 9th Anniversary Newsletter

Deltarune Chapter 2 Unused Track - Queen Battle (Original version)

Heya, short Q n A, because of everyone else who's making these.

Q: Gender?
A: Male

Q: Best music genre?
A: My taste in music is very chaotic. I am quite fond of Phonk, Jazz, Metal, Orchestral, and 80s style music. Mabe even medieval.

Q: Best video game?
A: Yo-kai Watch 3, no doubt, no hesitation.

Q: Best video game music-wise?
A: It's really hard to decide between Yo-kai Watch 3 and Genshin Impact.

Q: What is "Bessek"?
A: Bessek is a project I am working on since June of 2020. Originally, it was going to be a video game, but then I joined a team that did animations inside of Minecraft, that team being called "Endiversum Studios". They are the creators of "Endiversum", a Minecraft machinima series and I have cooperated with them for a whole while. Bessek will now also be a Minecraft machinima series. There's still a lot of planning and figuring things out to do, so be and stay tuned!

Q: Could we expect more than Bessek?
A: As I mentioned, Bessek is not the only thing Endiversum Studios does. As of December 6th 2023, it consists of four projects, the major one being Endiversum, of which the admin is CheesyKirah, who is also Endiversum Studio's CEO and founder. I act as the admin of Bessek, that being a product of the sub-team "Kosmic Freaks" (Yes, I know, creative name). The third sub-team is TheForbiddenTimeLabs, producing "Minecraft: Doctor Who: A Part of Time" and "Doctor Who: The Forbidden Timeline", led by nicht_AntTeen. The last sub-team so far is called "Laise Moat Games", working on a series of games with the name of Laise Moat. Short silly little adventures that seem too bizarre for human comprehension. The CEO CheesyKirah, lead composer SirCartaux and CFO Toaaaa are the main developers.
From time to time, you can expect something to happen in a series where multiple of these projects do a little crossover.

Deltarune Chapter 2 Unused Track - Queen Battle (Original version)

Ko5moFreak