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Timevolt / Long-term field survey dataset
Ecology / citizen science

Preserve dated versions of field-survey datasets without losing the original observations.

Preserve dated versions of field-survey datasets without losing the original observations. Keep your original source records together, then date the exact files. It does not prove who created the file, that its contents are true, or that it was sent, approved or accepted.

Try a file locally

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

EXAMPLE
Long-term field survey dataset
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.
      Long-term field survey dataset
      Long-term field survey dataset

      01 · Keep the exact files

      Keep the original files for long-term field survey dataset. Include any existing photos, signed records and source-system exports.

      Records to keep: Yearly census/survey data files and photos

      Long-term field survey dataset

      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.

      Long-term field survey dataset

      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.

      Wales — Newport Magistrates Court · 2024

      Check the wildlife survey before removing a roof

      Related: bat survey and building license

      A bat survey found three roosts, but a builder removed the roof without the required license. The builder pleaded guilty. The court set no immediate punishment if no more offences were committed for 12 months.

      Summarized on Oct 29, 2026

      Read the source ›
      England, local council planning process · 2022

      A delayed visit does not prove wildlife harm

      Related: bat survey and council response timing

      A neighbor challenged an old bat survey and slow action while a building was torn down. The reviewer upheld the complaint over delay but found no proof a faster visit would have changed the result. Staff were reminded of the rules, but no further steps were ordered.

      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 · GBIF network — international platform

      GBIF data publishing

      Organizational endorsement, standards and licensing

      Publication uses endorsed organizations, biodiversity standards and a suitable license. A private date receipt does not publish or validate observations.

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

      Read the source
      Needs something else · England — CL20 license, 2026–2030

      Natural England

      Survey registration, recordkeeping and annual reporting

      This license has specific registration and reporting conditions for permitted bat survey work. A file date neither licenses fieldwork nor replaces reporting.

      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.

      • ODK

        Provides offline field forms with photographs, GPS and dataset exports.

        Visit site

      • iNaturalist

        Provides community observations and identifications.

        Visit site

      • GBIF Integrated Publishing Toolkit

        Publishes standardized biodiversity datasets through an endorsed organization.

        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 the file, that its contents are true, or that it was sent, approved or accepted.

      It does not prove who created the file, that its contents are true, or that it was sent, approved or accepted.

      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 publish by dating my spreadsheet?

      No. GBIF describes organizational endorsement, structured data and publication steps.

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

      Context for this answer
      Does a receipt identify a species?

      No. iNaturalist uses observations and community identification; a file date supplies no biological verification.

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

      Context for this answer
      Can a field app collect offline?

      ODK describes offline collection and later synchronization. That is a separate tool capability.

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

      Context for this answer
      Does a receipt authorize a bat survey?

      No. England’s CL20 license requires registration and compliance with its conditions.

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

      Context for this answer
      Does publication replace scientific review?

      USGS describes separate development, review, approval and release practices for its science.

      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.