itexisted.app
Prove any file existed. Verified by Bitcoin.
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- DocumentationCode Development
- Target Audience
- FreelancersDevelopersIndie Hackers
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- Web
About itexisted.app
Early access. Upload any file. itexisted.app computes a SHA-256 hash and anchors it to the Bitcoin blockchain via OpenTimestamps. Within an hour you have a self-proving proof that this exact file existed at that moment, verifiable by anyone, without trusting us. No account required. No file leaves your device. The proof is a small .ots file that works offline, works in court, and survives even if itexisted.app disappears. Built on the same infrastructure that anchors 4,000+ production commits per day. One file, zero friction, independent proof.
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Product Updates (1)
CORE API launched >250K anchors on Bitcoin
Our anchoring solution is now ready to use for developers and integration partners.
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Comments (2)
Using Bitcoin to verify file existence is a clever use of blockchain. No accounts needed and independent proof — great for legal docs, IP protection, or audit trails!
@mitchell these are exactly the use cases that need independent proof and there are so many more to discover.
Your git history is editable. Your logs are self-issued. This anchors any file to Bitcoin in one upload. No account. Independent proof. What would you use it for?