42 Authentication of data in the field of financial transactions using blockchain technology; Authentication of data in the field of oil and gas and energy using blockchain technology; providing software for use managing contracts, payments, data, and assets in the fields of oil and gas, renewable energy, shipping, mining, construction, automobile, aerospace, health care, and supply chain and logistics; providing platform as a service (PAAS) for use managing contracts, payments, data, and assets in the fields of oil and gas, renewable energy, shipping, mining, construction, automobile, aerospace, health care, and supply chain and logistics; Computer services, namely, providing web sites to enable users to collect, store, manage, deliver and access content, manage contracts, payments, data, and assets in the fields of oil and gas, renewable energy, shipping, mining, construction, automobile, aerospace, health care, and supply chain and logistics