Abstract: [Purpose/Significance] As an important entry scenario into the application layer of the meta universe, digital collections can not only solve the identity authentication and rights governance problems of digital resources in the meta universe, but also become an important interface connecting a library's physical entity and the virtual space of the meta universe. At present, digital collections have attracted much attention in digital art, digital publishing, digital cultural creation, museums and other fields, but relatively little attention has been paid in the field of libraries. As a new business form in the digital economy era, digital collectibles have typical characteristics such as uniqueness, traceability, immutability, and ease of ownership confirmation. They are the perfect display of digitalization, virtualization, and ownership confirmation of library collection resources (such as books, ancient books, map literature resources, and various digital resources) in the metaverse space of libraries. Therefore, based on a scientific definition of the connotation and characteristics of library digital collections, we attempt to explore their value chain of "resources creativity casting dissemination service". [Method/Process] This article analyzes the differences and connections between the metaverse and digital collectibles, explains the connotation and characteristics of library digital collectibles, and conducts in-depth analysis of the paradigm construction of library digital collectibles' value chain from the perspective of the metaverse from five dimensions: resource end, creative end, casting end, distribution end, and service end. The scene embedding of its value chain is divided into structural embedding. There are three modes of functional embedding and memory embedding and they are explained separately. [Result/Conclusion] Research suggests that digital collections mainly originate from NFT, which is a local concept of NFT's localization of digital assets in China. Digital collections mainly include works of art, ancient books and documents, precious cultural relics, digital cultural creation, digital publications, model surroundings, news collections, digital music, 3D models and other types. Their digital resources are mainly text, images, audio, video and 3D models. Their creation sources are mainly from physical entity resources and virtual digital resources. Library digital collections are generated based on the policy environment, technical conditions, resource structure, business characteristics, and cultural precipitation in which Chinese libraries are located. They strip away the attributes of NFT virtual finance and virtual currency, and have Chinese characteristics and library business characteristics. Blockchain (especially alliance chain) technology is used to digitize the casting, distribution, and circulation of library specific collection resources, literature resources, or digital resources, the only trusted digital rights certificate provided for collection and use.

Key words: metaverse, library digital collections, trusted digital credentials, paradigm construction, scene embedding, blockchain