Alternatives
Products that do what hashtagfile.com does
Prove a file hasn’t been changed. Without uploading it.
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2016 · hash-archive.org
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Verifiable proof of document existence on blockchain.
Mar 2026 · notarize.anchordocservices.com
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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…
2024 · timestampit.com
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Save disappearing tweets with cryptographic proof
Feb 2026 · chromewebstore.google.com
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Github Link: https://github.com/prahladyeri/distroverify Folks, I'm a distro hopper who mainly hops between ubuntu distros such as ubuntu, xubuntu, ubuntu-mate, etc. One thing I've found is the frequent need to verify the SHA1 hashes of the local and original version found on cdimage.ubuntu.com. Sometimes, you forget to verify the hash immediately and later, you have to again scavenge for that download URL in your browser history and then find the hash files URL, isn't it? For this, I've created a tool called distroverify that automatically pulls the corresponding…
2019
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Your file's alibi. Timestamped proof of any file, forever.
Mar 2026 · docuproof.io
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