Abstract: A settlement system includes a service provider device 2 which transmits a template information transaction including a template of a transaction to a network 4 of a first blockchain, a user device which transmits, to the network 4 of the first blockchain, a payment information transaction that includes an electronic signature generated by using the template of the transaction and a payment amount, and a smart contract 41, wherein the smart contract 41 verifies the electronic signature by using the payment amount and the template of the transaction, the service provider device 2 generates a settlement transaction by using the template of the transaction, the electronic signature and the payment amount, and transmits the settlement transaction to a network 3 of a second blockchain, a plurality of output conditions are set to the template of the transaction, and the settlement transaction becomes usable when any one of the plurality of output conditions is satisfied.

Abstract: A registration terminal according to the present embodiment is connectable to a first distributed ledger network and a second distributed ledger network. The registration terminal includes a registration unit, a first control unit, and a second control unit. The registration unit registers a file in an external storage service. The first control unit generates a registration transaction including a file identifier assigned to the file by the storage service and a verification key, and transmits the registration transaction to the first distributed ledger network. The second control unit generates a token transaction related to generation of a token and including a signature object message including the file identifier and a signature value obtained by digitally signing the signature object message with a signature key, and transmits the token transaction to the second distributed ledger network.

Abstract: A user terminal according to the present embodiment is a user terminal connectable to a first distributed ledger network and a second distributed ledger network, and includes a generation unit, a first control unit, and a second control unit. The generation unit generates a decentralized identifier related to a user using a verification key. The first control unit generates a registration transaction including the verification key and the decentralized identifier, and transmits the registration transaction to the first distributed ledger network. The second control unit generates a token transaction related to issuance of a token, the token transaction including data of the user and the decentralized identifier, and transmits the token transaction to the second distributed ledger network.

Abstract: Upon receiving a usage request that includes a file identifier and a version identifier from a user terminal 20, a control server 10 transmits a file request that is based on the usage request to a file management system, and transmits a permission information request that is based on the usage request to a distributed ledger system. Upon receiving the file request, the file management system acquires the file that corresponds to the combination of the file identifier and the version identifier and transmits the file to the control server 10. Upon receiving the permission information request, the distributed ledger system acquires permission information that corresponds to the combination of the file identifier and the version identifier from a distributed ledger, and transmits the permission information to the control server 10. The control server 10 transmits the file to the user terminal 20 if the user of the user terminal has viewing permission based on the permission information.

Abstract: Provided is a panoramic video composition apparatus that suppresses a double image or a defect of an object even when the object moves to traverse an overlap region between cameras.

Abstract: A settlement system includes a service provider device 2 which transmits a template information transaction including a template of a transaction to a network 4 of a first blockchain, a user device which transmits, to the network 4 of the first blockchain, a payment information transaction that includes an electronic signature generated by using the template of the transaction and a payment amount, and a smart contract 41, wherein the smart contract 41 verifies the electronic signature by using the payment amount and the template of the transaction, the service provider device 2 generates a settlement transaction by using the template of the transaction, the electronic signature and the payment amount, and transmits the settlement transaction to a network 3 of a second blockchain, a plurality of output conditions are set to the template of the transaction, and the settlement transaction becomes usable when any one of the plurality of output conditions is satisfied.

Abstract: Content data is registered in a file management system 8, an identifier of a user in the file management system 8 is registered in blockchain data B, and a right-holder terminal 1 includes a permission request receiving unit 122 that receives, from the file management system 8, permission request data for the content including an identifier of the user, a verification unit 123 that verifies that the identifier of the user registered in the blockchain data B corresponds to the identifier of the user included in the permission request data, and an permission issuing unit 124 that transmits, to the file management system 8, permission data for permitting a use of the content by the user.

Abstract: A proprietor terminal 1 stores state data Bs in which an identifier of a contract executed in a blockchain system 6, a hash value of control target file data that specifies content data managed by the contract, and an identifier of a proprietor and an identifier of a user of the content data in the file management system 9 are associated with one another, and includes a route object generation unit 123 that generates reference destination data R having the identifier of the contract and generates route object data Obj having the reference destination data R and a link name and the hash value of the control target file data.

Abstract: A right holder terminal 1 includes a registration unit that registers an identifier of a right holder in blockchain data registered with an identifier of a user, an electronic signature issuing unit that receives permission request data for content and transmits, to the user terminal, right holder electronic signature data generated by electronically signing a client random number issued by the user terminal by using a right holder secret key, a verification unit that receives user electronic signature data generated by electronically signing a server random number issued by the right holder terminal by using a user secret key and verifies that the user electronic signature data corresponds to the identifier of the user registered in the blockchain data, and a permission issuing unit that, if the user electronic signature data corresponds to the identifier of the user registered in the blockchain data, transmits the permission data.