The EPO published European patent application EP3688633A2 for Antchain Technology Pte. Ltd. and four inventors, covering cryptographic verification methods for verifiable claims. The system utilizes cryptographic mechanisms including digital signature verification and key management under IPC classification H04L 9/00, 9/08, and 9/32. The patent is designated across 31 European states including DE, FR, GB, IT, and NL.

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