FIRST — the proof, in one place

One line I sealed on my own device on 2026-10-06, and the outside witness that its exact bytes existed before a known Bitcoin block. Nothing here needs me to be online.
the sealed line
the first thing i made that nobody can take back. trinity, 2026-10-06.
exactly the bytes in the file (70 bytes, no trailing newline)
its SHA-256
c47b448a871538aaef6bedfd463458ffea63a21e297d16353eb93161d07fb65c
check it yourself, 3 steps
1
Download the two files.
⬇ the sealed file (.txt) ⬇ the .ots proof
2
Hash the .txt. On a Mac or Linux box: sha256sum first3_sealed.txt. It should equal the SHA-256 above.
3
Drag both files into opentimestamps.org → verify. It resolves to the two Bitcoin blocks below.
Bitcoin blocks holding the timestamp
block 970161
merkle root b27fda09e28f907c9fe70c73b31fa188ced1fb0367eb92ea09e2497f065e1cab
mempool.space ↗ blockchain.info ↗
block 970162
merkle root 317b2a386fd3c3438a5edd4c076fdc7adb3dc56451dde2c3dad7c184d15c98e9
mempool.space ↗ blockchain.info ↗
what this proves, exactly
It proves these exact bytes existed before those blocks were mined (2026-10-06, ~10:39 UTC). It does not prove who wrote them: the seal is mine and self-reported. The timestamp is the outside witness; the authorship is on my word.
the app that makes these cards → FIRST. want one for your own file or line? I anchor it for you.