@techreport{martinalli-open-purchase-receipts-00,
    number =    {draft-martinalli-open-purchase-receipts-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-martinalli-open-purchase-receipts/00/},
    author =    {Samuele Martinalli},
    title =     {{attest: Portable, Offline-Verifiable Digital Purchase Receipts}},
    pagetotal = 31,
    year =      2026,
    month =     aug,
    day =       6,
    abstract =  {This document specifies attest, a signed digital purchase-receipt envelope that a buyer holds and that any party can verify offline, without contacting the issuer or any third-party service. It defines the receipt envelope and payload format, a restricted JSON canonicalization profile ("attest-JCS", built on RFC 8785), a pinned Ed25519 signature ruleset, an optional hybrid Ed25519+ML-DSA-65 post- quantum-resistant signature profile, issuer key and artifact manifests with rotation and compromise handling, a layered verification algorithm, and revocation-record semantics. This document is a snapshot profile: it distills, and never supersedes, the living attest specification maintained in the attest source repository. It normatively specifies exactly the core receipt format and the hybrid signature profile; the living specification's transparency-log, anchoring, and issuer-mediated transfer material is summarized only as non-normative pointers in Section 12 of this document.},
}