Offline Verifier for Attestix Ed25519 Credentials and UCAN Delegations R package attestix version 0.4.1 An offline verifier for verifiable credentials and delegation chains issued by the Attestix Python core. Verifies Ed25519 (RFC 8032) signatures over W3C Verifiable Credentials, decodes Ed25519 'did:key' identifiers, and verifies UCAN delegation chains (EdDSA 'JWT's) including capability attenuation, with no Python runtime required. Reproduces the Attestix JCS-style JSON canonical form (a practical subset of RFC 8785 that additionally applies 'NFC' Unicode normalization) byte-for-byte so that signatures produced by the reference implementation verify here. Useful for compliance, research and biostatistics users who work in R and need to check AI-agent compliance credentials. See <https://attestix.io> for the project and <https://attestix.io/spec/bundle/v1> for the bundle wire format. Software Depends: R (>= 4.0.0) Imports: sodium, openssl, stringi Suggests: jsonlite, testthat (>= 3.0.0) Pavan Kumar Dubasi <info@vibetensor.com> Comprehensive R Archive Network (CRAN) Pavan Kumar Dubasi [aut, cre], VibeTensor [cph, fnd] Apache License (>= 2) 2026-07-04 application/tgz https://CRAN.R-project.org/package=attestix doi:10.32614/CRAN.package.attestix