PSI-COMMIT – Bitcoin anchored cryptographic commitments

Summary: PSI-COMMIT enables users to cryptographically seal a message and prove its existence before an event without third-party involvement. It uses HMAC-SHA256 with a secret key stored only in the browser and anchors commitments to Bitcoin via OpenTimestamps for permanent, tamper-proof proof.

What it does

It creates a cryptographic commitment of a message using HMAC-SHA256 and timestamps it on the Bitcoin blockchain through OpenTimestamps, ensuring a verifiable, immutable record.

Who it's for

Users needing trustless proof of prior statements or decisions, such as for predictions or research pre-registration.

Why it matters

It solves the problem of unverifiable claims by providing mathematically secure, permanent proof without relying on centralized platforms or third parties.