Blog — Intellectual Property
How to Prove When You Created Something
For inventors, designers, writers, musicians, and developers — establish the date of creation before you need it.
Why Date of Creation Matters
In intellectual property disputes, the question is often not who created something but who created it first. Whether the dispute involves a patent application, a copyright claim, a trade secret allegation, or a prior art challenge, the outcome frequently depends on one thing: which party can prove the earliest date of creation with credible, independent evidence.
A file on your computer with a "created" date proves nothing. File timestamps are metadata controlled entirely by the operating system and can be changed in seconds by anyone with basic technical knowledge. Right-click, modify properties, and the date says whatever you want it to say. No court, arbitrator, or patent examiner will treat a local file timestamp as reliable proof of when something was created.
Email drafts, cloud storage timestamps, and version control logs are better — they introduce a third party into the chain of custody. But they are still controlled by a single organization. Google can change what is stored in your Drive. A Git commit history can be rewritten. An email provider can modify server logs. These records may be persuasive, but they are not independently verifiable.
What you need is an independent, tamper-proof record that no party — not you, not your opponent, not the platform provider — can alter after the fact. A record anchored to something permanent, public, and neutral.
Traditional Approaches and Their Limitations
Creators have tried many methods to establish date of creation, and each has significant drawbacks:
- •"Poor man's copyright" — mailing yourself a sealed envelope containing the work. This method is widely cited and almost entirely useless. Envelopes can be steamed open, resealed, or mailed empty and filled later. Courts have repeatedly found this approach unreliable, and it provides no legally recognized proof of creation date.
- •Copyright Office or Patent Office registration — the gold standard for formal IP protection, but expensive, slow, and limited in scope. Copyright registration costs $65 or more per work and takes months. Patent applications cost thousands of dollars and take years. Neither covers the full range of creative output — you cannot register a business idea, a pitch deck, or a set of meeting notes.
- •Notarization — requires scheduling an appointment, paying a fee, and physically presenting the document. The notary verifies your identity, not the content of the document or when it was created. The process is inconvenient for routine work and impractical for timestamping evolving projects with multiple versions.
- •Trusted timestamping services — proprietary platforms that claim to record when you uploaded a file. These require trusting a specific company to maintain accurate records, remain in business, and not alter data. If the company shuts down, your proof may become unverifiable. If they are acquired, their policies may change. You are trusting a single point of failure.
None of these methods provide a universally verifiable, permanent, free proof of when a file existed. Each introduces cost, delay, limited scope, or dependence on a trusted third party that may not exist when you actually need the proof.
How Cryptographic Timestamps Solve This
Cryptographic timestamping eliminates the need to trust any company, server, or third party. The process is simple, fast, and free:
- •You hash the file using SHA-256 — creating a unique mathematical fingerprint of the file's exact contents. If even a single byte of the file changes, the hash changes completely. The hash is a fixed-length string regardless of file size.
- •The hash is anchored to the Bitcoin blockchain via OpenTimestamps, an open protocol for creating permanent timestamps. Multiple hashes are aggregated into a Merkle tree, and only the root is written to Bitcoin — making the process efficient and scalable.
- •Once confirmed, the timestamp is permanent and independently verifiable by anyone. Reversing a Bitcoin confirmation would require re-doing all computational work since that block was mined — an impossibility in practical terms.
- •Your file never leaves your device — only the hash is transmitted. No one sees your document, reads your manuscript, or accesses your source code. The process is completely privacy-preserving.
- •The entire process takes under 30 seconds and costs nothing. No account, no registration, no subscription. The proof is generated immediately and upgraded to a full Bitcoin-anchored timestamp within about an hour.
This works for any file type: PDFs, images, audio recordings, video files, source code archives, CAD files, manuscripts, spreadsheets, presentations — anything that can be represented as a digital file can be timestamped with the same level of cryptographic certainty.
What to Timestamp and When
The most important principle is to timestamp early and timestamp often. Do not wait until a project is finished — timestamp early drafts, sketches, and prototypes to establish the earliest possible date of creation. In a dispute, the party with the earliest provable date has the strongest position.
- •For inventions: timestamp lab notebooks, sketches, prototypes, technical specifications, and engineering notes. Each stage of development creates a new record of progress that can establish the evolution of an idea over time.
- •For creative works: timestamp manuscripts, compositions, recordings, design files, and storyboards. Writers, musicians, artists, and filmmakers benefit from proving when each draft existed — not just the final version.
- •For software: timestamp source code archives, architecture documents, commit snapshots, and technical specifications. Open-source maintainers and independent developers can establish provenance of their contributions without relying on any single platform.
- •For business ideas: timestamp pitch decks, business plans, meeting notes, and strategic documents. Before sharing ideas with potential partners, investors, or collaborators, create a timestamped record that proves you had the idea first.
Store the .ots proof file alongside the original document — you will need both to verify the timestamp later. The proof file is small (typically a few kilobytes) and should be backed up just like the original work.
Timestamp regularly as your work evolves. Each version of a document gets its own independent proof with its own Bitcoin-anchored date. Over time, you build a chronological chain of evidence that tells the complete story of when and how your work developed — a record that is far more compelling than any single timestamp alone.
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