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Timevolt / Release or commit stamp
software timestamp

Ship the release. Keep the exact dated artifact.

Software timestamp — Ship the release. Keep the exact dated artifact. Save the exact archive, commit or tree reference and any release manifest.

Try a file locally

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

EXAMPLE
Release or commit stamp
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.
      Release or commit stamp
      Release or commit stamp

      01 · Keep the exact files

      Save the exact archive, commit or tree reference and any release manifest.

      Records to keep: Artifact or commit

      Release or commit stamp

      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.

      Release or commit stamp

      03 · Keep the evidence

      Keep the source history and license records separately. A dated artifact does not document unrecorded history.

      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 · 2014

      Code made during leave can raise ownership questions

      A worker said he built rival software while on unpaid leave. The employer said it owned the code under their work deal. The court refused the employer's bid to win without trial; ownership was not finally settled.

      Summarized on Oct 29, 2026

      Read the decision ›
      US · 2017

      Save code before shared access ends

      A programmer and a firm fought over who owned source files. Files were said to have been removed, and the firm did not spot lost access until later. The court kept a temporary order for the firm, not a final ownership ruling.

      Summarized on Oct 29, 2026

      Read the decision ›

      Related cases

      US · 2019

      Editable file dates need support from real records

      Related: trademark evidence file dates

      A person used image dates and an old-looking webpage to claim earlier name use. Those records could not be checked or restored. The panel found fake evidence, excluded it and closed the challenge for good.

      This is a trademark evidence case used as an analogy for editable file dates.

      Summarized on Oct 29, 2026

      Read the decision ›

      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.

      Accepts · US federal courts

      Federal Rules of Evidence 902(14)

      Data copied from a file is self-authenticating if authenticated by a process of digital identification, with a qualified person's certification; the 2017 committee note says identical hash values reliably attest that original and copy are exact duplicates.

      Supports using a SHA-256 match to show a file is the same as the one stamped. It addresses identity of the file, not the date by itself; the date rests on the timestamp authority's evidence, and a certification and notice are still required.

      Source summary as of 2026-10-28. Check the current source and applicable local rules.

      Read the source
      Unclear · US federal courts

      Federal Rules of Evidence 902(13)

      A record generated by an electronic process or system that produces an accurate result is self-authenticating with a qualified person's certification.

      Could cover a timestamp authority's output if someone can certify the system is accurate; whether a court takes a given receipt this way is up to the court.

      Source summary as of 2026-10-28. Check the current source and applicable local rules.

      Read the source
      Accepts · Internet standard

      RFC 3161 (Time-Stamp Protocol)

      A TSA's role is to establish evidence that a datum existed before a particular time; it works on a hash only and does not identify the requester.

      Defines exactly what a TSA token shows and what it leaves out; it is a technical standard, not a legal rule. Certificate status must be checked separately.

      Source summary as of 2026-10-28. Check the current source and applicable local rules.

      Read the source
      Needs something else · US Copyright Office / courts

      17 U.S.C. 410(c)

      A registration certificate made before or within five years after first publication is prima facie evidence of the validity of the copyright and the facts in the certificate; later, weight is at the court's discretion.

      For copyright claims in the US, registration is the route the statute rewards. A time receipt is separate supporting evidence, not a substitute.

      Source summary as of 2026-10-28. Check the current source and applicable local rules.

      Read the source
      Needs something else · Git (tool documentation)

      git-commit manual

      Commit author date can be overridden with --date or GIT_AUTHOR_DATE; the committer date can be set with GIT_COMMITTER_DATE.

      A tool-level fact, not a venue rule, but it explains why a repo's own log is not independent proof of date.

      Source summary as of 2026-10-28. 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.

      • Git commit history alone

        Keeps source-code revisions and commit records.

        Visit site

      • GitHub signed commits (Verified badge)

        Checks commit signatures against signing keys.

        Visit site

      • OpenTimestamps

        Provides open standard, hashes locally, Bitcoin anchor.

        Visit site

      • FreeTSA.org (RFC 3161 via openssl)

        Provides DIY RFC 3161 timestamps with openssl commands.

        Visit site

      • US Copyright Office registration

        Registers eligible works with the U.S. Copyright Office.

        Visit site

      Related workflows.

      Model or dataset releaseApp ideaSecurity report submittedTerms in force on a dateQuarterly user access review: the reviewer list, decisions and removals frozen as submittedAccess or license request, manager approval and grant

      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 wrote the code, that you own it or that it is original, what the license is, or who wins a dispute; a receipt for a hash also says nothing about unreleased history unless you stamped it.

      This cannot establish authorship, ownership, originality, license rights or a dispute 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.

      Can I fake or change a git commit date?

      Yes. Git lets the committer set the author and committer dates with a flag or environment variables, so a commit date alone is a claim, not proof. A date from an outside timestamp authority is not set by you.

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

      Context for this answer
      Does a signed commit prove when I wrote the code?

      No. A signature shows the change came from the holder of a key. GitHub's own docs describe the Verified badge's timestamp as when verification completed, not when the commit was made.

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

      Context for this answer
      Is my source code uploaded?

      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.

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

      Context for this answer
      What should I stamp: a commit, a tag or a release file?

      Stamp what you ship: the release archive or build artifact, plus a text file listing the commit ID (and tree) it came from. A commit ID is itself a hash of its contents, so stamping it also pins the history behind it. Stamp each release, because a receipt covers only what was stamped.

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

      Context for this answer
      Is a time receipt the same as copyright registration?

      No. Registration with the US Copyright Office costs $45 to $65 online and creates an official record with legal presumptions in some cases. A time receipt is a quick, cheap dated record of exact files; use it as supporting evidence, not a replacement.

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

      Context for this answer
      Will a court accept a time receipt?

      That is up to the court. In US federal courts a hash comparison can help authenticate that a file is identical to the one stamped (Rule 902(14)), but weight and admissibility are decided case by case.

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

      Context for this answer
      What is the difference between this and OpenTimestamps or FreeTSA?

      Both are free and legitimate. OpenTimestamps anchors in Bitcoin; FreeTSA gives you RFC 3161 tokens through openssl. A time receipt combines an independent TSA date with a Bitcoin anchor, then packages the proof and a printable receipt so you do not manage .tsr or .ots files yourself.

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

      Context for this answer
      If someone else copied my code, does the receipt prove they stole it?

      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

      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.