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Timevolt / Approved drawing revision
Construction / engineering

Keep a dated copy of the exact engineering drawing revision that was submitted for review.

Keep a dated copy of the exact engineering drawing revision that was submitted for review. Keep your original source records together, then date the exact files. It does not prove who created a record, its truth, physical location, custody, consent, approval, sending, delivery, acceptance or the outcome of a dispute.

Try a file locally

Your photos and files stay on your device, so keep them.

EXAMPLE
Approved drawing revision
1 Nov 2026
Authority time: 14:02 UTC · example
Bitcoin block time: 14:10 UTC · example
Last checked: 15:02 UTC · example
✓ Dated◆ Permanent
Now keep it safe: three things
  1. Keep your photos and files unedited. The receipt only matches the originals. Put them in an album such as “My records”.
  2. Save this receipt to your camera roll.

    Keep the receipt file too. The image is a handy copy; checking needs the file.

  3. Email it to yourself.Email it to myself

    Your mail app opens a draft. Attach your receipt image and receipt file. Don’t attach your photos or documents. Timevolt does not send it or know whether it was sent.

Your record, one step at a time.

Your photos and files stay on your device, so keep them.

Local preview: files are fingerprinted here. Notes and progress stay in this browser. Keep downloaded copies; browser storage is not a backup.

0 items
How?

Add the exact original files for this part of the record. Keep them unchanged; a different export or edit has a different fingerprint.

Add link and screenshots

The link is recorded, not fetched or verified.

    0 items
    How?

    Record the date, time, place and who you spoke to. New notes are saved separately rather than editing an old note.

    How to keep notes that hold up
    Write it down

    By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.

      By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.

      How to keep notes that hold up

      Write notes as soon as you can. Keep the original account rather than replacing it later; the venue decides what weight it gets.

      1. Write it down straight away, on paper or in the box on a step.
      2. Put the date, time and place at the top, and who you spoke to.
      3. Use their words where you can; separate what you saw from what you were told.
      4. Sign or initial a paper note, photograph it and add the photo.
      5. Never edit an old note. Add a new dated entry when something changes. A device save time is not independent time evidence or proof of event order.
      Approved drawing revision
      Approved drawing revision

      01 · Keep the exact files

      Keep the original files for approved drawing revision. Include any existing photos, signed records and source-system exports.

      Records to keep: The stamped shop drawing or connection-detail PDF exactly as approved and sent to the fabricator

      Approved drawing revision

      02 · Date the file’s code

      Your device fingerprints the selected file or manifest. Dated follows an independent timestamp; Permanent follows Bitcoin anchoring.

      An independent time, tied to the exact bytes.

      Approved drawing revision

      03 · Keep the evidence

      Keep the original files and complete receipt separately, alongside any existing venue, signature and workflow records.

      Keep the originals too. A changed or compressed copy has a different fingerprint.

      Try a file. It stays here.

      Make a test receipt on this device.

      By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.

      or drop a file here

      Real cases: why the saved copy matters.

      Real cases where dated records mattered. We don’t claim a time receipt would have changed the result.

      US Missouri · 1988

      Approval must follow the required engineering checks

      Drawings missed key links, and changed shop plans passed without proper checks. After a walkway fell, the court kept the engineers' work bans and the firm's loss of authority. It removed one uncharged finding without changing that result.

      Summarized on Oct 29, 2026

      Read the source ›

      Related cases

      US federal · 1918

      Followed specifications can still be defective

      Related: government sewer specifications

      A contractor followed government sewer plans, but a hidden blockage helped cause flooding. The top court kept the contractor's win. Broad inspection terms did not shift the risk of flawed plans, and the government had wrongly ended the contract.

      Summarized on Oct 29, 2026

      Read the source ›
      UK · 2017

      An industry standard may fall short of contract

      Related: wind foundation design obligations

      A wind-foundation design met a flawed industry standard, but the contract set a stricter working life. The top court allowed the owner's appeal. It restored the ruling that the contractor was to blame.

      Summarized on Oct 29, 2026

      Read the source ›

      What courts, schemes and regulators say.

      Positions below refer to the cited rule or record type, not endorsement of Timevolt. This service is not represented as an eIDAS qualified timestamp provider. A non-qualified timestamp does not receive the qualified timestamp presumption.

      Needs something else · US federal procurement

      Construction contracts incorporating FAR52.236-21

      Where required, the contractor coordinates and reviews shop drawings and marks approval; the contracting officer separately approves or disapproves. Approval generally does not relieve errors or contract responsibility, subject to the clause's approved-variation exception.

      Scope: clause paragraphs (e)–(g). Alternate record-drawing provisions apply when incorporated, not automatically to every project. A receipt is neither contractor review nor contracting-officer approval.

      Source summary as of 2026-10-29. Check the current source and applicable local rules.

      Read the source
      Needs something else · US California

      Civil engineering documents covered by Professional Engineers Act section 6735

      Covered construction-release civil plans and specifications require the licensee's signature, seal or stamp and signing date; interim documents state their intended purpose.

      The board’s 2026 Act, effective January 1, 2026 unless otherwise noted, section 6735(a). Scope is California civil engineering, not every international drawing. A timestamp is no professional seal or responsible-charge determination.

      Source summary as of 2026-10-29. Check the current source and applicable local rules.

      Read the source

      Other ways to do this

      Prices change. Check each provider’s site for current prices and service details.

      • Bluebeam Revu

        Provides PDF markup and drawing comparison.

        Visit site

      • Autodesk Forma Data Management

        Stores and manages project documents.

        Visit site

      Related workflows.

      Quarterly user access review: the reviewer list, decisions and removals frozen as submittedAccess or license request, manager approval and grantQuarterly user access review: the list shown to the reviewer, each keep/remove decision and proof removals happenedHuman-in-the-loop approval before an AI agent executes a high-impact action (refund, payment instruction, production change, customer message)Who was physically present at a members' or condo board meetingHuman-made process record

      Proves / Doesn’t prove

      Proves

      A completed time receipt shows that the exact selected file existed by the independently witnessed time. You can check whether a later copy has the same bytes. It does not establish creation time, authorship, identity, event order, location or the truth of the contents.

      Doesn’t prove

      It does not prove who created a record, its truth, physical location, custody, consent, approval, sending, delivery, acceptance or the outcome of a dispute.

      It does not prove who created a record, its truth, physical location, custody, consent, approval, sending, delivery, acceptance or the outcome of a dispute.

      These are the bounds of a completed proof. The local tester does not establish any time. The chosen court, scheme or regulator decides what to accept.

      Questions, answered plainly.

      Your file stays on your device. During normal receipt creation, your device sends a randomized code made from its fingerprint, plus encrypted recovery data. It doesn't send the plain fingerprint or the random value that opens the code. Keep the original file and the complete receipt for checking. Privacy Policy.

      Does a receipt approve a drawing?

      A completed time receipt shows that the exact selected file existed by the independently witnessed time. You can check whether a later copy has the same bytes. It does not establish creation time, authorship, identity, event order, location or the truth of the contents.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Can the drawing's signing date be replaced?

      No. California's covered civil engineering documents require the licensee's signature, seal or stamp and signing date as specified in section 6735.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Should a draft be labeled as final?

      No. The California provision calls for interim documents to state an intended purpose such as preliminary or not for construction. Preserve that status in the saved copy.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Does approval remove responsibility for an error?

      Under this federal clause, approval generally leaves the contractor responsible, subject to the specified approved-variation exception. Other contracts and jurisdictions need separate review.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Would dating a drawing have prevented the collapse case?

      The opinion concerns missing calculations, inadequate design and failed engineering review. It does not say that an independent time receipt would have prevented the failure.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer

      The file tester runs on your device. It does not issue a timestamp or take a payment.

      Keep the records you already have.

      Keep your original files and any existing official records while the receipt service is being prepared.