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Timevolt / Sealed bot or strategy submission
Competitions / AI contests

Contest submission archive checklist: date existing code without claiming official entry.

Contest submission archive checklist: date existing code without claiming official entry. Keep your original source records together, then date the exact files. It does not prove identity, authorship, truth, location, consent, sending, delivery, approval, ownership, compliance, acceptance or who wins.

Try a file locally

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

EXAMPLE
Sealed bot or strategy submission
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 bot or strategy submission
      Sealed bot or strategy submission

      01 · Keep the exact files

      Keep the original files for sealed bot or strategy submission. Include any existing photos, signed records and source-system exports.

      Records to keep: Bot code or prediction file hashed before the deadline

      Sealed bot or strategy submission

      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 bot or strategy submission

      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

      Related cases

      Related cases from nearby fields. We don’t claim a time receipt would have changed the result.

      UK · 2020

      Low ticket sales may not justify extending deadlines

      Related: prize promotion deadline changes

      A promoter intended to extend a prize draw if too few tickets sold. The ad reviewer found low sales did not justify the change, even once. It upheld complaints and required future draws to follow the rules.

      Summarized on Oct 29, 2026

      Read the source ›
      UK · 2018

      Short-notice reopening can disadvantage original entrants

      Related: promotion voting and reopening

      A prize event closed early by mistake, then reopened with short notice. The ad reviewer found this could put first entrants at a disadvantage and upheld complaints. It required future events to follow the stated terms.

      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 · Japan ICPC2026domestic first round

      Official organizer rules

      Source-code submission and permitted tools/network access

      Programs are submitted to the contest system for compilation/execution. External network access and generativeAI tools are prohibited during that event; never imply this separate service may be used during a prohibited session.

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

      Read the source
      Needs something else · Europe ICPC2025historical event

      Official EUC rules

      DOMjudge contest control and judging rules

      Historical event specifies authoritative contest system and judging. Independent date does not submit an entry, establish allowed assistance or determine score; current event rules need separate checking.

      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.

      • DOMjudge

        Manages contest submissions and automated judging.

        Visit site

      • Codabench project

        Provides reproducible benchmarking platform.

        Visit site

      • EvalAI project

        Provides challenge evaluation/submission platform.

        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, authorship, truth, location, consent, sending, delivery, approval, ownership, compliance, acceptance or who wins.

      It does not prove identity, authorship, truth, location, consent, sending, delivery, approval, ownership, compliance, acceptance or who wins.

      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 file date mean my entry was submitted?

      No. The Japan2026rules require source code to go through the contest system; an independently dated local file does not do that.

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

      Context for this answer
      May I call an external receipt service during the contest?

      Do not assume so. Japan's2026first-round rules prohibit outside network access; follow the actual event rules.

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

      Context for this answer
      Does dating code prove I wrote it unaided?

      No. The same event separately restricts outside consultation and generativeAI; a date verifies neither authorship nor permitted assistance.

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

      Context for this answer
      Can the organizer's system already keep submissions?

      The historical2025EUCevent used DOMjudge as its contest control system. Keep the organizer's entry identifiers and results alongside your authorized existing copy.

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

      Context for this answer
      Does a receipt permit changing the closing date?

      No. Covered UK promotions have separate closing-date fairness rules; a saved file cannot change them.

      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.