Timestamps
OpenTimestamps proofs for each essay’s published source (Korean index.md and English en.md).
Each .ots file anchors the SHA-256 of the file into the Bitcoin blockchain via public calendars,
proving the content existed at or before the attested time. No account, no content upload: only the hash.
Verify: ots verify timestamps/<slug>_index.md.ots -f <slug>/index.md
Upgrade pending proofs (after a few hours): ots upgrade timestamps/*.ots
Stamp a new essay: timestamps/stamp.sh <slug>