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Timevolt / Crypto transaction records
crypto tax software

Keep the export behind your tax records.

Crypto tax software — Keep the export behind your tax records. We fingerprint export files; We do not connect to your wallets or exchanges or hold cryptocurrency for you.

Try a file locally

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

EXAMPLE
Crypto transaction records
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.
      Crypto transaction records
      Crypto transaction records

      01 · Keep the exact files

      We fingerprint export files; We do not connect to your wallets or exchanges or hold cryptocurrency for you.

      Records to keep: Exports

      Crypto transaction records

      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.

      Crypto transaction records

      03 · Keep the evidence

      Keep what your tax authority requires and any professional advice separately. This is not tax advice.

      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 records made at the time matter.

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

      United States · 2023

      Keep enough records to rebuild gains

      A taxpayer gave no calculation of crypto gains, so the IRS rebuilt them from exchange records. The taxpayer later agreed those figures were right but fought the tax on fairness grounds. The court rejected that defense.

      Official Tax Court opinion checked: docket 18582-21, entry 28 (T.C. Memo. 2023-91). Gain figures were agreed before trial, not decided in a cost-basis fight.

      Summarized on Oct 29, 2026

      Read the source ›

      Related cases

      US · 2024

      Exchange records may be held outside your control

      Related: access to exchange-held account records

      A taxpayer challenged the tax office's access to crypto exchange records and said all gains had been reported. The court rejected the privacy and fair-process claims over those exchange-held records. It kept the case closed.

      Summarized on Oct 29, 2026

      Read the decision ›
      US · 2023

      Refunds can leave tax questions unanswered

      Related: tax refund procedure

      Taxpayers disputed when crypto rewards should be taxed and what they were worth. The tax office gave a full refund. The court closed the case without deciding that timing issue.

      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.

      Silent · US

      IRS

      Virtual currency FAQ 46 (records) and FAQ 40 (specific identification): keep records sufficient to establish positions on returns, including acquisition and disposition dates, basis, and proceeds.

      The IRS names what records must show; FAQ 40 requires the date and time each unit was acquired and disposed of, but says nothing about how those are verified or whether a third-party timestamp counts. Without documentation of the donor's basis, basis is zero (FAQ 32).

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

      Read the source
      Silent · US

      IRS

      How long should I keep records: property basis records kept until the limitations period ends for the year you dispose of the property; 3 years default, 6 if income omitted over 25%, indefinitely if no return filed.

      The page does not address whether electronic records are acceptable or how they should be dated.

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

      Read the source
      Silent · UK

      HMRC

      Check if you need to pay tax when you sell cryptoassets: keep per-pool records of token type, disposal date, number disposed and left, sterling value, bank statements, and pooled costs before and after.

      HMRC says exchange reports do not replace your own records and that it will ask to see them in a compliance check. No retention period on that page and nothing on timestamps.

      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.

      • Spreadsheet or Google Sheets log

        Keeps transaction entries in a spreadsheet.

        Visit site

      • Exchange CSV exports (Coinbase, Kraken, Binance etc.)

        Exports transaction records from an exchange account.

        Visit site

      • Koinly

        Imports exchanges and wallets and builds tax reports.

        Visit site

      • CoinTracker

        Provides portfolio and tax-form generation tied to account sync.

        Visit site

      • TokenTax

        Provides tax reports plus accountant service.

        Visit site

      • Cloud folder backups of exports (Drive, iCloud, Dropbox)

        Stores backup copies of transaction exports.

        Visit site

      Related workflows.

      Bank statements downloaded at the timeInvestment call recorded before the movePayment made recordReceipt archiveTax documents as filedQuarterly user access review: the reviewer list, decisions and removals frozen as submitted

      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 the transactions happened, that the figures or cost basis are correct, who owns the wallet, or that a tax authority will accept the file.

      This cannot establish transactions, ownership, cost basis, correct tax figures or filing.

      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.

      What records do I need to keep for crypto taxes?

      Dates and values of each acquisition and disposal, your cost basis, proceeds, and which wallet or account held the units. The IRS lists these in its virtual currency FAQs; HMRC asks for per-pool records.

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

      Context for this answer
      How long should I keep crypto records?

      In the US, keep basis records until the limitations period ends for the year you dispose of the asset, which is usually at least 3 years after filing and longer in some cases. HMRC's crypto page gives no period.

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

      Context for this answer
      Is an exchange report enough?

      HMRC says exchange transaction reports do not replace your own records because they do not track pooled costs. Keep your own copy of the exports.

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

      Context for this answer
      What if I cannot prove my cost basis?

      The IRS can treat basis as zero where it is not documented, for example for gifts without donor records (FAQ 32). Other cases depend on the facts.

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

      Context for this answer
      Which units are treated as sold if I do not choose?

      The IRS treats the earliest acquired units as sold first (FIFO) unless you specifically identify units and can substantiate them.

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

      Context for this answer
      Does a time receipt prove my gains or my cost basis?

      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.

      Do my exchange files get 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.

      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.