An architect’s evidence routine from concept to as-built

Last checked 12 November 2026. General information, not legal advice.

Why a routine beats a rescue

A building project produces many versions, shared with many parties: sketches, planning sets, tender drawings, revisions, IFC exports, as-built records. Disputes about who had what, and when, usually surface months later, when the working files have moved on. A short routine at each handover is cheaper than reconstructing the story afterwards.

The routine below is general and US/EU-friendly. It is not legal advice, and it does not replace your contract, your insurer’s conditions or local rules. See also the architecture timestamping overview.

The routine, stage by stage

For each stage, do the same three things: freeze a copy that you will not edit, fingerprint it (the free SHA-256 hash checker works in your browser), and log what it is, who it went to and how.

1. Concept. Freeze the sketch set, mood boards and the first model export before you present. If you enter a competition or tender, date the concept before you submit. See design concepts in tenders and competitions.
2. Client revisions. Number each issued revision and keep the issued PDF set exactly as sent. See client revision rounds: what to timestamp at each stage.
3. Planning or permit submission. Keep the full submission set as filed, with the portal receipt. See planning and building permit submissions.
4. Client approval. Record which revision was approved, and keep the approval message with that exact file. See client approval of drawings.
5. Construction issue and model exchange. Freeze each IFC export or issue package at the moment it is shared. See BIM model version disputes.
6. As-built and handover. Freeze the final record set and the handover pack, and note any changes from the approved set. If the appointment ends early, see appointment terminated and your design reused.

How this fits a common data environment

Many projects run through a common data environment (CDE). Under ISO 19650-1, which sets out principles for information management using BIM, a CDE manages information containers through states: work in progress, shared, published and archive. The UK BIM Framework guidance describes the archive as a journal of information transactions that gives an audit trail of how a container developed.

That journal is valuable, and it is kept inside the platform that the project uses. A TimeBind is separate and independent of that platform. It cannot replace the CDE, and the CDE is not a substitute for it. Used together, you can show both what the project system recorded and that an exact exported file existed no later than a recorded time. See BIM CDE version history vs a timestamp.

What to date, and what to keep with it

• The exact file as issued: PDF set, IFC export, native model or drawing package, as appropriate to your contract.
• The transmittal or message that sent it, including date, recipients and revision code.
• Your log line with the fingerprint, file name, revision and purpose.
• The Proof of Time Certificate from the TimeBind, stored with the files.

A TimeBind can cover up to 10 files at once, and the files stay on your device. A Pooled TimeBind is batched and confirmed later, so do it at the time rather than the night before you need it.

A note on copyright, in the US and EU

In the U.S., copyright protects an “architectural work”, defined as the design of a building embodied in a tangible medium including plans or drawings, for works created on or after 1 December 1990. The Copyright Office says standard features, standard space configurations and purely functional elements are not protected, and registration is a separate process through its Standard Application. In the EU, rules differ by country. Our who owns architectural drawings article is the starting point, and a lawyer in your jurisdiction should advise on ownership.

A dated record does not decide ownership. It can help show what existed in an exact form at a given time. For the “show a design existed first” question, see how to show a design or drawing existed before someone else’s version.

Keep it light, so you actually do it

The best routine is the one a practice follows on a busy Friday. A good minimum is: freeze and fingerprint at four moments, namely before you present a concept, when you submit for permit or tender, when the client approves, and at handover. Add the others when a project carries more risk or a more difficult client. Write down the routine once, as an office standard, and use the same naming for every project.

Sources checked

• U.S. Copyright Office, Circular 41: Copyright Registration of Architectural Works (definition, elements not protected, registration).
• U.S. Copyright Office, What Does Copyright Protect? (FAQ) (architecture and the 1 December 1990 date).
• ISO, ISO 19650-1:2018 (abstract and status page).
• UK BIM Framework, Information management according to BS EN ISO 19650: Facilitating the common data environment (container states and archive journal).

Freeze and date the files at each handover

Your first Pooled TimeBind is free, with no credit card required. After that, TimeBinds start from US$5, and an ASAP TimeBind is US$15. Click here to start, or see plans and pricing.