itexisted.app
Prove any file existed. Verified by Bitcoin.
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- Target Audience
- FreelancersDevelopersIndie Hackers
- Platforms
- 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.
Product Insights
itexisted.app provides a web-based utility for anchoring file hashes to the Bitcoin blockchain via OpenTimestamps. The service generates independent .ots proof files for documentation and code without requiring user accounts or file uploads to a server.
- Local SHA-256 computation ensures no files leave the user device.
- Uses OpenTimestamps to anchor proofs directly to the Bitcoin blockchain.
- Generates portable .ots files that remain verifiable offline and independent of the platform.
- Supports high-volume anchoring via a dedicated CORE API for developer integrations.
Ideal for: Freelancers, developers, and indie hackers needing verifiable proof of existence for their documentation and code development projects.
Product Video
Watch a video demo of itexisted.app.
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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?