What is yousaidthat.org?
yousaidthat.org is a non-custodial, client-side tool that allows users to generate cryptographically verifiable proof of existence for any piece of information. By leveraging the Bitcoin blockchain for timestamping and Arweave for permanent, censorship-resistant storage, it ensures that your ideas, predictions, or claims are anchored in time.
Why Founders Need It
In a world of rapidly advancing AI, intellectual property disputes and the need for public accountability are rising. Whether you are documenting an early-stage product concept before filing for a patent, or making a bold market prediction that you want to verify later without relying on a centralized intermediary, this tool provides an immutable record of ‘who said what, and when.’
Key Features
- Proof of Existence: Anchors data via OpenTimestamps on the Bitcoin blockchain.
- Sealed Predictions: Uses drand IBE (Identity-Based Encryption) to lock content until a specific future date.
- Zero-Knowledge Architecture: All cryptographic operations occur in your browser; the server never sees your plaintext data.
- Permanent Storage: Public entries are stored indefinitely on Arweave.
How to Use It
Simply visit the website, input your text or file, and choose between ‘Proof of Existence’ (immediate public verification) or ‘Sealed Prediction’ (time-locked until a future reveal). Because it is entirely client-side, there is no account setup required.
Pricing & Alternatives
The service is entirely free, open-source, and does not require registration. While traditional notary services exist, they lack the decentralized, trustless immutability offered here. It serves as a superior, modern alternative to legacy timestamping methods for tech-savvy founders.
