Oil and gas well fracturing and stimulation services; oil and gas well perforating and treatment services; well improvement services, namely, hydraulic fracturing of subsurface geologic formations to enhance well production

Authenticating antiques; Authenticating jewelry; Authenticating works of art; Authentication of data in the field of collectibles, inventory and asset management using blockchain technology; Authentication, issuance and validation of digital certificates; Computer security services in the nature of providing authentication, issuance, validation and revocation of digital certificates