Block #3

block	#3 of 39 (chain of 40 blocks)
sealed at	2026-09-05T15:46:27.747Z
kind	article (open era)
content	Why a Hash Chain Is Tamper Evident
signed by	unsigned (open era)
block hash	`a2c80c6c562a61feaf8e4d2b3c72182142936f3f22a91dcfd491b0509d4da4ea`
previous hash	`22c7e308735624a6358e279f46cbeeda3250d860bbbab3a3b7ab2ae0e2324cdc`
public anchor	confirmed in Bitcoin block 966087, 966092, 966114 ✓ — statement · proof (.ots) · verify it yourself

This is the library’s own record; it lives on no third-party blockchain, by sealed covenant (no token, ever).

Verify it without trusting this page: download the raw chain and recompute every hash, or check the signed tip at /api/tip.

The public anchor stamps exactly (index, hash, sealedAt, and this page’s URL) into Bitcoin via OpenTimestamps — verify the proof with the open ots tool; no trust in this server needed. All anchors: /api/anchors.