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Alternatives

Products that do what I made a new kind of Trusted Timestamp based on plaintext encoding does

I've just launched a new site that creates Trusted Timestamps. Anyone can use it to make any data immutable going forward in time. By "verifying" a Trusted Timestamp against a file, you certify that file has not been altered since the time the Trusted Timestamp was created at. Trusted Timestamps are not a new idea, there is a standard defined in RFC3161 and some other prior work as well. My design though is different as it is based on plain-text, human readable files. I believe this makes this form of Trusted Timestamp more accessible for a wider set of applications. I found the RFC3161…

  1. 1BT
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    TimeSeal116

    Restoring digital trust, one blockchain timestamp at a time

    2023

  3. 3BC
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    Claimby107

    Free legally-valid timestamps for your files, ideas & art.

    2018

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    Hey HN -- thanks for showing interest in this. Happy to collaborate on this project. I'm hoping to get it stable soon so my own family can start using it. I've been working on this for about 10+ years, nights and weekends. It's been really slow going since I only have my own personal data to test it with. I just don't love that my data is primarily stored on someone else's computer up in the cloud. I want my own local copy at least. And while I can download exports from my various accounts, I don't want them to just gather dust and rot on my hard drive. So, Timelinize helps keep that data…

    Oct 2025 · timelinize.com

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    TimeSkip327

    Generate timestamps for videos in seconds

    2024

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    Generate timestamps for your video in seconds

    2024

  10. 10AU

    I find myself having to convert a lot of unix timestamps to a human readable format, but most of the online calculators I found don't include the micro or nanoseconds in the human readable output. It's a small detail, but I find myself having to manually space out the timestamp frequently. I'm learning frontend development, so I made this converter to hopefully make it easier to convert timestamps. Welcome to any feedback :)

    2023 · justquickmath.com

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    Quickly convert timestamps into other timezones

    2017

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    Live UTC clock with one-click copy for ISO 8601, RFC 3339, RFC 2822 and Unix time, a device clock-skew check, and get-the-time-now code for 14 languages. Dark, fast, no signup.

    25d ago · utctime.app

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    Cryptographic timestamps for documents — no file storage

    Jul 2026 · docproof.app

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    Prove it existed. Permanently.

    Jan 2026

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    OSHIStamp125

    YouTube video timestamp creation support tool

    2025

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    Prove that you said things before anyone else

    Jun 2026 · yousaidthat.org

  17. 17AE
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    Proof.ink100

    Proven immutable data stored on the Steem blockchain

    2019

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    VERI2

    Cryptographic proof & timestamping of files and interactions

    Mar 2026 · veriroot.org

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    This project has been kicking around in my head since I first heard about the webauthn PRF extension in early 2024. I've slowly chipped away at it since, and finally got things to a shareable state over the summer thanks to a very fun parental leave. Headed back to work tomorrow, so I figure there's no time like the present. tldr: A client-held encryption key derived during passkey authentication encrypts all sensitive user data prior to persistence so that only the user is able to decrypt and reuse that data on their device. This allows short-lived, privacy-preserving age proofs to be…

    18d ago · loginwithone.com

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    ✨ Instant legal proof-of-existence for any document.

    Dec 2025

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    Prove your files existed before AI could rewrite them

    Mar 2026 · timebinder.io

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    Prove any file existed. On-chain timestamp. In 60 seconds.

    Nov 2025

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