Abstract: A content generation apparatus capable of easily confirming content data, the information of which is registered in a blockchain, is provided. An image pickup apparatus generates an image file and then immediately calculates a hash value of the image file, and transmits image file information including the hash value to a management system. In response to receipt of a registration completion notification indicating that a process of registering the image file information in a blockchain is completed, the image pickup apparatus stores registration-completed information indicating that the image file information is registered in the blockchain, relating to the image file.

Abstract: A content generation apparatus capable of guaranteeing that a provider of a content is a generator of the content is provided. The content generation apparatus that generates a content according to an instruction received from a user includes an acquisition unit configured to acquire biometric information of the user, a biometric authentication unit configured to perform biometric authentication of the user based on the biometric information of the user, a hash value generation unit configured to generate a hash value of the content in a case that the biometric authentication of the user has succeeded, and a communication unit configured to transmit the content and information of the content to a management server that registers the hash value and the information of the content in a blockchain. The information of the content includes result information indicating a result of the biometric authentication of the user.

Abstract: A content management system includes a memory device and at least one processor. The memory device stores a set of instructions. The at least one processor configured to execute the instructions to apply an edition process to a content in accordance with an instruction from an administrator of the content, generate a hash value of an edited content immediately after generating the edited content by the edition process, generate an identification number for identifying the edited content, register the hash value of the edited content and the identification number in a blockchain in association with each other, receive a content subjected to an authenticity determination and an identification number for identifying the content concerned, and determine the authenticity of the received content by comparing a hash value generated from the received content with the hash value registered in the blockchain and corresponding to the received identification number.

Abstract: An image capturing apparatus capable of guaranteeing the authenticity of contents while reducing the calculation load of a hash value of an image file. The image capturing apparatus generates an image file, and performs processing for reducing a file size of the image file. A hash value generation section calculates a hash value by applying a hash function to the processed image file. Reduction processing information indicating a method of reducing the file size is generated, and the image file, the hash value, and the reduction processing information are transmitted in a state associated with each other, to a management system that registers data associated with the image file including the hash value in a blockchain.