Cyntrisec This document defines the Attested Inference Receipt (AIR), a COSE_Sign1 envelope carrying CWT claims profiled per the Entity Attestation Token (EAT) framework. An AIR receipt binds model identity, input/output hashes, platform attestation metadata, and operational telemetry into a single signed artifact suitable for audit, compliance, and third-party verification of a confidential AI inference event. AIR v1 targets single-inference receipts emitted by workloads running inside hardware-isolated Trusted Execution Environments (TEEs). It supports AWS Nitro Enclaves and Intel TDX measurement formats, with extension points for additional platforms. Pipeline chaining and multi-inference receipts are out of scope for this version.