###### Abstract
The entrusted authorization model means that the museum authorizes an agent to sign an authorization contract with the authorized person on behalf of the museum, a common museum proxy authorization model. In the proxy authorization model, agents as authorized intermediaries often have rich authorization management experience and mature customer groups, respond quickly to market demand, and have strong marketing capabilities, which can assist museums in rapidly opening up the authorization market, thereby promoting museums. The cultural and creative production industry has developed rapidly. However, agents, as market entities dominated by economic interests, tend to ignore the public welfare contained in cultural relics, significantly weakening the museum's ability to control the use of the digital collection by authorized third parties. In this process, third parties are based on market interests driving the development and utilization of authorized resources, so the cultural and economic risks faced by museums will increase accordingly. The platform authorization model is similar to the entrusted authorization model, but there are differences in the scale of the authorizing party and the authorized party. Under the entrusted authorization model, it is usually one-to-one, that is, a museum entrusts  
Figure 2: The digital direct authorization model of museum collections. a company to externally authorize, while under the platform authorization model, it is usually many-to-many, that is, multiple museums, middlemen, and authorized parties concentrated in a certain platform carry out authorization. The platform authorization model not only solves the problem of insufficient hardware facilities when most museums carry out the authorization of digital image resources of cultural relics, but also effectively reduces the transaction cost in the process of authorization of digital cultural relics. However, in the platform authorization model, the digital authorization of collections is mainly carried out in the network environment, which is likely to entail transaction risks, including intellectual property rights infringement. 3 Comprehensive authorization model for museum digital collections  
The comprehensive authorization model is a composite authorization model, which is a diversified and differentiated authorization strategy made by the museum based on its actual situation. Possessing a certain brand awareness, a large number of collection images, high social recognition, and a variety of types of authorized objects are necessary conditions for the adoption of a comprehensive authorization model; therefore, it needs to be based on the museum's brand awareness, social influence, collection scale, and organization factors, such as staffing and the type of the subject matter of authorization, in making the relevant decision. The comprehensive authorization model combines the advantages of direct authorization and entrusted authorization and helps to optimize the authorization model of different subjects and maximize value creation. The disadvantage is that the complexity of the comprehensive authorization model increases the transaction cost of the authorization process, which will occupy more museum resources to a certain extent. The Metropolitan Museum of Art adopted a comprehensive authorization model when developing art authorization. Blockchain is a kind of distributed data storage, which has the characteristics of point-to-point transmission, consensus mechanism, and encryption algorithm. For museums, blockchain technology has great value for the digitization of collections and artworks, especially cultural relics, specimens, and artworks. Blockchain has great potential in the confirmation of digital identities. This technology can generate an ID card based on an encryption algorithm for each institution or each person. It has the characteristics of decentralized data storage, decentralization, and traceability.