video1.0<iframe src="https://www.loom.com/embed/581b9632eeb84832bd45ab602e40aaf1" frameborder="0" width="1728" height="1296" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>12961728Loomhttps://www.loom.com12961728https://cdn.loom.com/sessions/thumbnails/581b9632eeb84832bd45ab602e40aaf1-46dbec1c03d6525b.gif336.55This Loom explains a document control system for tracking physical custody of controlled drawings on a federal job site. It shows about 40 controlled sets total, with 19 on the shelf, 11 checked out in the field, 11 checked out in the field, and 8 overdue, and it replaces time-consuming paper logs by enabling fast search and overdue filtering. Each binder and redline set gets a QR label and every handoff is logged automatically with who, when, and why, as permanent append-only lines that cannot be edited or deleted. The system stores metadata only (no pictures or drawing content) and can generate an on-demand custody record for auditors, including an SSH 256 hash to prove the record was not altered.