Public log checkpoints
The state of the whole proof log, signed every day and after every closed week.
Each checkpoint signs the Merkle tree over every entry of the log and is chained to the previous checkpoint by the SHA-256 of its file. Each one names a recent Bitcoin block and is anchored in Bitcoin through OpenTimestamps. Every week is copied to an immutable release on GitHub (DeiFlagellum/sigelith-log) and saved in the Internet Archive, and every quarter the complete log is deposited in Zenodo with a permanent DOI (latest version: 2026-Q3). Anyone can download the log and check that nothing was removed or rewritten — without trusting us.
Checkpoints began on 25 September 2026. The first one covers every entry since the log began on 15 June 2026; the weeks before it are sealed by their own signed weekly roots, OpenTimestamps proofs and bank transfers (proof page).
Latest checkpoint
- Number
- #56 (daily)
- Issued
2026-11-12T00:09:50.963782Z- File SHA-256
790dd21af6ea766c6769c2c753f98ae3f20570153017bb884225b99c2100485f- Global tree
tree_size1112, rootcad36683e0c66ac75eec7dbdcf63dfdba41e7640c7c53a0b528f2c94bee78f19- Bitcoin block
- 975492
0000000000000000000150cdac7fe28c2828cf2b2f671292f927c52a0f6627ec
Weeks
| Week | Checkpoints | Weekly checkpoint |
|---|---|---|
| 2026-W46 | 4 (#53–#56) | week still open |
| 2026-W45 | 8 (#45–#52) | #52, SHA-256 158c92ef6f1dccb309cded808dc0acf1debb3d73d0d76c3b7570fe5d79c9e61e |
| 2026-W44 | 8 (#37–#44) | #44, SHA-256 d0ae31cbe1714dd035f69442783aee925eca068559ddfd6be9d9978bc5820d00 |
| 2026-W43 | 8 (#29–#36) | #36, SHA-256 fb73d836b53770a7f959ccf2cb4a937866ec03b0e078f9afc66128b68f8ca22a |
| 2026-W42 | 8 (#21–#28) | #28, SHA-256 acf84acdd577536fff98fddd21cf9e941ac5964864a35826682547e658e22d1a |
| 2026-W41 | 8 (#13–#20) | #20, SHA-256 df810c931f9a329670cca291804eb9a7d9c4e3428bacb85ff93156f253790d83 |
| 2026-W40 | 8 (#5–#12) | #12, SHA-256 5792a1d213797b8f909dc6a76ee8c0243c6c250742697fd96722d5236c390dd4 |
| 2026-W39 | 4 (#1–#4) | #4, SHA-256 fa5b17dafbec6c921e3a9e10db7a2c836ed303c1eee50d206302692242184e15 |
Machine access
/api/proof/checkpoints/latestand/api/proof/checkpoints/<n>— numbers run without gaps./checkpoints/<n:06d>.jsonand.json.ots— the exact files./api/proof/consistency?first=<m>&second=<n>— RFC 9162 consistency proof between the tree sizes of two checkpoints./api/proof/entriesand/api/proof/dumps— the whole log.
Formats and the verification procedure: the proof specification and the README of DeiFlagellum/sigelith-log.