Mmastodon BusinessCrypto first seen 2 d ago, last 2 d ago, peak #1
Free Bitcoin-Based Timestamping Lets Anyone Prove a File's Existence
Original: Prove a file existed, unchanged, by a certain date, or check a proof someone sent you. Free, using OpenTimestamps and Bi
OpenTimestamps offers a free way to prove a file existed, unchanged, at a certain date by anchoring its fingerprint in the Bitcoin blockchain, with no coins, wallets or uploads required. The file is hashed locally in the browser, and verification of proofs sent by others is equally simple. One privacy advocate reports having timestamped 978 of their own documents this way.
Why now: Growing interest in practical, privacy-respecting tools for proving document integrity and timestamps without third parties.
Evidence
- Prove a file existed, unchanged, by a certain date, or check a proof someone sent you. Free, using OpenTimestamps and Bitcoin, with no coins or wallets involved. The file is fingerprinted in your browser and never uploaded. We've timestamped 978 of our own documents this way,… · makeprivacy@mastodon.world · 1
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