Helixar Limited Agentic AI systems operate on behalf of human principals, often delegating tasks through multi-step chains of AI agents. There is currently no standard mechanism to record who authorized an agent to act, under what scope, and through what chain of delegation, in a way that can be verified offline, without a central registry, and without third-party trust anchors. This document specifies the Human Delegation Provenance Protocol (HDP) version 0.1, a lightweight token-based protocol that captures, structures, cryptographically signs, and verifies human delegation context in agentic AI systems. An HDP token binds a human authorization event to a session, records each agent's delegation action as a signed hop in an append-only chain, and enables any participant to verify the full provenance record using only the issuer's Ed25519 public key and the current session identifier. Verification is fully offline. No registry lookup, no network call, and no third-party trust anchor is required. HDP's distinguishing contribution is a signed, tamper-evident record of each agent's declared action at each hop, an execution audit trail that complements, rather than replaces, capability-based delegation formats such as UCAN and ZCAP-LD. The underlying append-only, offline-verifiable chain-of-custody mechanism is payload-agnostic; human-authorized agentic delegation is the reference profile specified in this document. HDP is not an authorization protocol. An HDP token confers no authority and its presentation entitles the presenter to nothing. It is a record of who authorized a task and of what each agent declared it did with that authorization, carried with the task and read at audit.