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Timevolt / Sealed bid committed
Procurement / auctions

Keep a dated fingerprint of the bid file you prepared, alongside official submission evidence.

Keep a dated fingerprint of the bid file you prepared, alongside official submission evidence. Keep your original source records together, then date the exact files. It does not prove identity, origin, truth, physical state, presence, consent, authority, sending, delivery, acceptance or outcome.

Try a file locally

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

EXAMPLE
Sealed bid committed
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.
      Sealed bid committed
      Sealed bid committed

      01 · Keep the exact files

      Keep the original files for sealed bid committed. Include any existing photos, signed records and source-system exports.

      Records to keep: Bid document hashed before the deadline and revealed at opening

      Sealed bid committed

      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.

      Sealed bid committed

      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 federal · 1979

      Keep receipt evidence from before bid opening

      A winning bid was late, and records did not prove arrival before bids opened. The reviewer upheld a protest and urged ending that award and looking at the other bid. The later action was not checked.

      Summarized on Oct 29, 2026

      Read the source ›

      Related cases

      US federal · 2024

      A gateway receipt may miss the required inbox

      Related: quotation delivery requirements

      A supplier's quote reached an email gateway, but not the required inbox. Receipts for other files did not show that one arrived. The protest failed, and a separate value claim closed because the supplier could not win the award.

      Summarized on Oct 29, 2026

      Read the source ›
      US federal · 2017

      Check delivery to the named mailbox

      Related: task-order proposal mailbox receipt

      A supplier had email receipts, but its offer did not reach the agency's required inbox. The reviewer rejected the protest. It did not decide if broader rules on late offers could apply to that type of deal.

      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 procurements governed by baseline FAR Part 14

      Federal Acquisition Regulation

      FAR 14.304, FAC 2026-01 effective 13 March 2026

      Receipt at the specified government office and enumerated evidence/exceptions matter. A bidder's external fingerprint date is not official receipt. Applicable agency deviations and solicitation terms must be checked.

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

      Read the source
      Needs something else · US federal baseline FAR Part 14

      Federal Acquisition Regulation

      FAR 14.401 safeguarding

      Unopened restricted custody before opening is distinct from proving a file existed. A time receipt is not a sealed bid box.

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

      Read the source
      Needs something else · US federal, where adopted through applicable agency FAR overhaul deviation

      Revolutionary FAR Overhaul model Part 14

      Model 14.301 receipt and 14.303 opening

      Model renumbers receipt to 14.301 and specifies receipt records and secured opening. Model availability does not establish which agency deviation applies to a particular invitation.

      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.

      • BiddingSimple

        Describes encrypted bid submission, opening and audit workflows.

        Visit site

      • Bid Express

        Provides native e-bidding submission, lockbox, error alerts and bid tabulation.

        Visit site

      • BuildingConnected BC Pro

        Provides sealed subcontractor submissions and administrator opening.

        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 identity, origin, truth, physical state, presence, consent, authority, sending, delivery, acceptance or outcome.

      It does not prove identity, origin, truth, physical state, presence, consent, authority, sending, delivery, acceptance or outcome.

      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 an early fingerprint count as submission?

      No. Baseline federal rules address receipt at the designated office, not only preparation of a file.

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

      Context for this answer
      Does a time receipt keep a bid secret?

      No. Federal safeguarding rules require secured restricted custody; a fingerprint date alone provides no access control.

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

      Context for this answer
      Does an email delivery confirmation settle receipt?

      Not necessarily. In the task-order example, GAO found confirmations did not establish delivery to the required mailbox.

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

      Context for this answer
      Can the same FAR section number mean something different?

      Yes. The opened overhaul model places submission in 14.301 and uses 14.304 for mistakes; check the applicable agency deviation and invitation.

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

      Context for this answer
      Can a native bidding tool replace the receipt?

      The BC Pro guide describes deadline-based access and opening controls. Those functions are distinct from an external record of byte existence.

      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.