← the record

Proof: Chinese team sets world record with swarm of 116 underwater drones

The record — the exact bytes that were hashed

{"first_seen":"2026-09-29T01:32:46Z","headline":"Chinese team sets world record with swarm of 116 underwater drones","kind":"front-page-headline","rank":1,"source":"scmp","url":"https://www.scmp.com/news/china/science/article/3369031/chinese-team-sets-world-record-swarm-116-underwater-drones?module=top_story&pgtype=homepage","v":1}

Download headline-4addffb8d2d0.json

SHA-256

4addffb8d2d064b4c06ab8968cd63609faeac1575c1daf051036834ffb69a97d

OpenTimestamps

Confirmed in Bitcoin block 969085, mined 2026-09-29 01:50 UTC.

Download headline-4addffb8d2d0.json.ots

Wayback Machine

• The record pageCaptured 2026-09-29 01:37 UTC — view the capture.
• The story pageThe Wayback Machine could not capture the story page: error:no-request.

Check it yourself — none of this needs this site

1. Hash the record: sha256sum headline-4addffb8d2d0.json prints 4addffb8d2d064b4c06ab8968cd63609faeac1575c1daf051036834ffb69a97d. Its first twelve characters are the end of this record's address.
2. Drop headline-4addffb8d2d0.json and headline-4addffb8d2d0.json.ots onto opentimestamps.org, which checks the receipt against the Bitcoin block chain. Or, with the OpenTimestamps client and a Bitcoin node: ots verify headline-4addffb8d2d0.json.ots (ots upgrade first while the receipt is pending).
3. Open the Wayback Machine's captures above: the capture of the record page shows this hash as it stood then, and the capture of the story page shows the newsroom's own page.

Sealed automatically, 4 min after it was first seen.