The system described in European Patent Application Nr. EP26425032 (BE-627223) uses ultra-wideband spatial sensing, a short-range, pulse-based radio protocol that senses objects with accuracy to the centimeter, the companies say in the announcement. The system uses this technology to confirm the vital signs and physical presence of the user within a defined zone, and then binds the event cryptographically to the users DID, which is stored in a digital identity wallet like The Hashgraph Group’s IDTrust. The software issues a VC which embeds the presence binding token, zone identifier, timestamp and cryptographic hash anchored to a distributed ledger network for tamper-proof auditability. Third party verifiers can then confirm the validity of the credential through selective disclosure with a zero-knowledge proof module.