Public log
A record we cannot quietly rewrite
Every document finished on DropTheDoc is added to a public list that only ever grows. Each night we publish the list's fingerprint right here. Save one, and from then on the maths can catch us if we ever try to change the past.
Latest notice
Published Aug 31, 2026, 3:58 AM UTC
40
documents on the record so far. The list only ever grows.
Fingerprint of the whole list
9a26729766d6adbec39c84106370ebdb0fac28c34abde95f6335dcb1db55347aSave this line anywhere we cannot reach it. An email to yourself is enough.
Signed with Ed25519. The public key ships with every checkpoint.
How it protects you
One short code keeps us honest
No account needed, nothing to install, and you never have to trust this page. Here is the whole trick.
Every finished document adds a line
The moment a document completes, its fingerprint joins the list. Only the fingerprint, a short code computed from the file, so nothing private is ever published.
Every night, one code sums up the list
All the lines are folded into the single fingerprint shown above. Change any old line, even by one character, and tonight's code would come out different.
Anyone can hold us to it
Save tonight's code, an email to yourself is enough. Any day later, we can prove the list still begins with the one you saved. If we ever rewrote history, that proof would fail. Maths, not a promise.
Earlier notices
Every past checkpoint stays valid forever. Copy any of them and ask us to prove today's list still begins with it.
Aug 28, 2026, 3:58 AM UTC
39 recorded
04caca9700…2dd1628426Aug 23, 2026, 3:58 AM UTC
38 recorded
9cefbf9c4b…c5c2b988a2Aug 18, 2026, 3:58 AM UTC
36 recorded
326d70722a…272dcef400Aug 17, 2026, 3:58 AM UTC
35 recorded
abc6014b64…54f90e23d4Aug 15, 2026, 3:51 AM UTC
32 recorded
ca55569187…316dbc1106Aug 14, 2026, 3:51 AM UTC
31 recorded
55d0b1c5a0…5d8cac05b2Aug 8, 2026, 3:45 AM UTC
30 recorded
60e460d326…aaf9574babAug 5, 2026, 3:26 AM UTC
29 recorded
858d734f78…0a4d40aa36Aug 4, 2026, 3:01 AM UTC
27 recorded
fd98ec37a4…697d88be20Aug 2, 2026, 3:53 AM UTC
23 recorded
4aa5151140…b4e8989004Aug 1, 2026, 3:15 AM UTC
21 recorded
035ae657cf…d611b6eb2bJul 31, 2026, 3:25 AM UTC
16 recorded
2722bd7196…5ac4d79b90Jul 30, 2026, 3:40 AM UTC
14 recorded
571cf5696d…03fd0f9981
For the technical reader
You do not need any of this to be protected. It exists so anyone who wants to audit us can, with standard tools: the log is an RFC 6962 Merkle tree and proofs verify per RFC 9162.
https://dropthedoc.xyz/api/ledgerThe latest checkpoint and recent history, with the exact leaf and signature formats spelled out. Save a copy anywhere we cannot reach it.
https://dropthedoc.xyz/api/ledger/proof?sha256=…Proof that a completed file is in the log: the file's SHA-256 in, its entry number and Merkle path out.
https://dropthedoc.xyz/api/ledger/consistency?first=…Proof that today's log still begins with exactly the log you saved earlier: same entries, same order, nothing rewritten.
Holding a signed PDF right now?
The verify page runs all of these checks for you in one drop, on your own device.