Due to the prolonged impact of COVID-19 in 2020, there has been a shift from non-face-to-face, "Untact" life to online, face-to-face, "Ontact" life. In this context, a singer named ‘Travis Scott’ held an online concert in the 'Fortnite' and reaped substantial profits, while the late 'The Notorious B.I.G.' also organized a live performance on a ‘Horizon World’. These phenomena took place within a virtual space known as the Metaverse, and the concept of the Metaverse gained rapid prominence due to active engagements. The performances described above involve the creation of spaces within the Metaverse, akin to theaters, stages, and outdoor plazas, where multiple individuals can congregate. These spaces allow for direct experiential engagement with copyrighted works within the virtual domain. While the utilization of copyrighted works in virtual spaces is permissible under the current copyright framework, the amalgamation of copyrighted elements such as dance, architecture, fashion, crafts, and furniture complicates the management of each copyright. To address this challenge, this paper proposes the utilization of a hierarchical NFT system. This system aims to organize large-scale virtual performances, designating a "Root Node" for the overall event and configuring each individual work encompassed within the performance as a separate "Leaf Node." This hierarchical approach facilitates the management of distinct copyright permissions for each work. Through this paper, it is anticipated that effective management of integrated copyrights, as seen in virtual performances, will become feasible. Furthermore, it is expected that transactions involving copyrighted works, such as permission agreements for their usage, will experience heightened activation.