Journalism & Whistleblowing

Gridcoin Blockchain Stamping

http://u4embjw2uzwpdubgm72ywbmixte4kqgwurc4r4rp6elhlokutdfsy4id.onion
Online · last check 25/08 06:08 EN Indexed on 31/03/2026

Stamp documents permanently on the Gridcoin blockchain. Drop a file in the browser, the SHA-256 hash gets written to the chain, the document itself never leaves your device.

Extract
Notarize documents with the Gridcoin blockchain Stamping a document on the Gridcoin blockchain creates a publicly verifiable record that it existed at a specific time. Any later edit, even a single bit, produces a different hash, so tampering shows up immediately. More about how it works . To notarize a document or verify it later, drag and drop the file below. The service is free to use. Select f
Quality score
42% Medium quality
1 inbound links 130 pages indexed 97% availability
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