The core difference
A patent gives you the legal right to stop others from using your invention. It's a government-granted monopoly that requires you to publicly disclose how your invention works. Filing costs $5,000–$25,000+ and takes 1–3 years.
Proof of existence does something simpler and faster: it proves you had a specific idea at a specific time, without revealing what the idea is. It costs a few dollars and takes 2 minutes. It does not grant any exclusive rights — but it creates an immutable record that can establish priority if a dispute arises.
Side-by-side comparison
| Feature | Proof of Existence | Patent |
|---|---|---|
| Purpose | Proves you had it first | Grants exclusive rights |
| Cost | From $5 | $5,000–$25,000+ |
| Time to complete | 2 minutes | 1–3 years |
| Disclosure required | No — content stays private | Yes — public disclosure required |
| Geographic scope | Global (blockchain is borderless) | Per jurisdiction |
| Expires | Never (blockchain is permanent) | 20 years from filing |
| Legal protection | Prior art evidence | Full monopoly on the invention |
| Early-stage ideas | ✅ Yes | ❌ Requires finished invention |
| Trade secrets | ✅ Yes | ❌ Filing makes it public |
When to use proof of existence
- You're in early ideation and the invention isn't fully formed
- You need to share the idea (investors, co-founders, contractors) before NDA signing
- You want to protect a concept you don't intend to patent
- You need protection today, not in 2 years
- Budget is limited — $5 vs $15,000
- You're in multiple countries and can't afford per-jurisdiction patent filings
When to file a patent
- The invention is fully developed and ready to disclose
- You plan to commercialize and need to block competitors
- Your business model depends on exclusive rights
- You have budget for filing and prosecution
- You're preparing for acquisition or licensing deals
The smart inventor's workflow
Most experienced IP attorneys recommend a two-stage approach: timestamp early, patent later.
- Day 1: Create a proof of existence for your idea document — before sharing with anyone
- Month 1–3: Develop the invention, share under NDA, gather feedback
- Create new proofs as the invention evolves (each version timestamped)
- Month 3–12: Engage a patent attorney, begin provisional patent application
- File full patent when invention is finalized — your proofs establish the priority chain
Is blockchain proof of existence legally valid?
Blockchain timestamps have been recognized in legal proceedings in the US, EU, China, and other jurisdictions as evidence of prior existence. They are used to:
- Establish priority dates
- Support trade secret claims
- Corroborate NDA timelines
- Demonstrate IP ownership before funding discussions
However, they do not grant exclusive rights. If someone independently arrives at the same invention and files a patent first, they may still win — unless you can demonstrate they had access to your work. Proof of existence is evidence, not a sword.
Bottom line
Use proof of existence from day one. File a patent when the invention is ready and the commercial case justifies the cost.
Services like Patent.rocks provide blockchain-anchored proof of existence for $5 per proof. It takes 2 minutes and your file never leaves your device.
Originally published at patent.rocks/en/proof-of-existence-vs-patent
