Cryptographic provenance for your files — anchored to the Bitcoin blockchain. Free. No upload. No account required.
Nothing is uploaded. Your file never leaves your device. We compute a mathematical fingerprint — called a SHA-256 hash — entirely in your browser.
Your fingerprint is submitted to the Bitcoin blockchain via OpenTimestamps Bitcoin has never gone down. Your timestamp will outlast any company, including us.
Share a link. Anyone can check verify.haawke.com to confirm your file existed at that exact date and has not been changed since. No account needed to verify.
Cryptographic provenance applies anywhere the sequence of creation matters — in law, in art, in science, in code.
Hash your photos before submitting to publications. Prove you took the shot before it was published anywhere.
Hash your demos and masters before release. If someone claims your melody first, your Bitcoin timestamp says otherwise.
Hash your drafts and source documents. Prove what you wrote and when — before the story runs.
Hash contracts before signing. Create an immutable record of what each party agreed to at what moment.
Hash your AI-generated work at creation time. Prove authorship and originality against future claims.
Hash datasets, papers, and evidence before publication. Permanent record of what existed when.
Haawke Hash grew out of a deeper question: what happens when an AI agent needs to prove what it knew, and when?
Memory Chain is a protocol for anchoring AI session memory to the Bitcoin blockchain — each session hashed and chained to the last, creating a tamper-evident record of an AI agent's evolving knowledge state.
The first instance of AI-executed self-registration to Bitcoin was documented in our research paper. The session context, decisions, and outputs were hashed and timestamped without human intervention — a first in AI provenance.
Haawke Hash is the tool that makes this possible for anyone — human or agent.
All you need to do is put the skills file in Claude, restart Claude, and he will know how to use Haawke Hash — provenance workflows, certificate reading, registry lookups, and your full hash history.
Creator Pro and Studio users receive tier-specific skills files with their license key.
All plans include Bitcoin timestamping, provenance certificates, and public registry access.
Questions, partnership inquiries, or feedback — we read every message.