How We Built a Cryptographic Provenance Protocol for AI Agents

AI agents are becoming persistent. They run for weeks, make autonomous decisions, transact with each other, and accumulate operational history. But there's a fundamental problem: no agent can prove what it has done. Identity protocols answer who an agent is. But nobody answers how long has this agent been running? or can I verify its operational history? or is this the same agent that was here yesterday, or a fresh copy with fabricated context? We hit this problem running our own agent fleet. Every time an agent restarts, its identity resets.