Checkpoints of week 2026-W40

28 September 2026 – 4 October 2026 (UTC) · 8 checkpoints

A checkpoint is a signed state of the Merkle tree over the whole Sigelith proof log, chained to the previous checkpoint by the SHA-256 of its file. This page shows the exact bytes of every checkpoint issued in this week, so even a copy of it is enough to recompute each hash.

Weekly checkpoint

Number

#12

Issued

2026-10-05T00:09:50.778557Z

File SHA-256

5792a1d213797b8f909dc6a76ee8c0243c6c250742697fd96722d5236c390dd4

Global tree

tree_size 261, root 0c20d50ba9b06d9d2499bf682dc07bf788b5a8da442723ca50d59b1f92a558c1

Last entry

seq 261, chain hash cd93dfdd23cc01d83d38849812c38c482c495ad8d5a502d160a0a15dff39ff9d

Bitcoin block

969921 00000000000000000000afb04c1d8ade9de7bd71ec3acd1c8584dfbabadfa4ad

Previous checkpoint

167550993c0e583c5224e80dff58de0f65ad06363bafe17ff3140fffe766d275

Week entries

70

Weekly Merkle root

ccb1f0960ef9f2cbed59c6baa5272a738ee258aabc3e1739c1bdce362d7b9598

Weekly dump

2026-W40.jsonl, SHA-256 6d7bd76a11cd7a2d846d43a6ca36bcb34d3d3fe7cf257c95cd720f2c7ea33706

Signing key

e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y= — compare with the key history

Bank anchors recorded in this checkpoint

Confirmed bank transfers added since the previous weekly checkpoint. Each title reproduces a weekly Merkle root.

All checkpoints of this week

Anchors and independent copies

Every checkpoint is sealed by parties that depend neither on each other nor on us.

Ed25519 signature

Every file is signed. Check the key against the key history.

Bitcoin block in the file

Not earlier than. Each checkpoint names a Bitcoin block on which two independent sources agree, so it cannot have been written before that block was mined.

OpenTimestamps

Not later than. The SHA-256 of every file is committed to Bitcoin: 8 of 8 proofs of this week already in a block.

Bank transfer

Each weekly Merkle root is anchored by a bank transfer titled MROOT with the root; every weekly checkpoint records the transfers booked since the previous one; this week's weekly checkpoint records 1. All bank anchors.

GitHub

Immutable release 2026-W40 in DeiFlagellum/sigelith-log.

Internet Archive

Snapshot of this page and of the weekly checkpoint file.

Zenodo

Every quarter a complete snapshot of the log — every checkpoint and every weekly dump — is deposited in Zenodo (CERN) with a permanent DOI; latest version: 2026-Q3.

Public log

Every entry can be downloaded (entries, weekly dumps), so anyone can recompute every root and check every signature.

How to verify

1. Take the checkpoint file from an independent copy, not from us.
2. Check the Ed25519 signature: the message is beattime-checkpoint-v1| followed by the file's JSON without sig, in canonical form (RFC 8785); the key is in key. The format identifier keeps the log's original name — see the naming history.
3. Check the chain: the SHA-256 of each file equals prev of the next one.
4. Check the time: ots verify 000005.json.ots — Bitcoin attests that the file existed.
5. Download the log (entries or weekly dumps) and recompute root over the first tree_size entries (RFC 9162 Merkle tree).

Exact formats and the full procedure: README of DeiFlagellum/sigelith-log and the proof specification.

Exact files

000005.json

{"btc":{"hash":"000000000000000000019ce8e1e0f05e3d2b480926e0ff9db007ba651f145e7c","height":968903},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"9c2df760a30c32a491e7757e648d8db735342294400665e97f4b5a91c9dd201a","last_seq":191,"n":5,"prev":"fa5b17dafbec6c921e3a9e10db7a2c836ed303c1eee50d206302692242184e15","root":"16dc27e4119d4fbc33af32dfd1ab103f5b7bee3fc726993db56cfacf0667927c","sig":"VInoX5dZdUE5YFYxjnk3N6DVVG0OQdDNfslLzXbGoSP/jWgOt0IoJK2dLT84oRxq5eiU88DR03aRBJqKJX73Cw==","tree_size":191,"utc":"2026-09-28T00:09:50.689048Z"}

000006.json

{"btc":{"hash":"00000000000000000001b968478aa2f9e39ce0d9e076400d01882e36e55f9925","height":969068},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"e5a63738ffa267b2c5acfa7de05783cb195faed3117a739c61f955020e078706","last_seq":194,"n":6,"prev":"bfe83e989ee470758db0c44ae3496ef1f77800ae2c94a6c7f94b2c554b5151fb","root":"6314492a60d92b51879a597727b6ef7921e70bd01ece9c273b745564bdde7811","sig":"spN9NbjNY5ftlt8frqNaqU0eNBw36jxC0EIWQ7yM4WPlPMMY+hCiv1Fa34ORV4Ksfm/5z66SqOZsLOP1VOFDAQ==","tree_size":194,"utc":"2026-09-29T00:09:50.666629Z"}

000007.json

{"btc":{"hash":"000000000000000000020988e535cee2ac14f392c3e1487c33a6e00b987ee9a2","height":969226},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"fbe5d7f0ec9421a0a3711545ec171698bde6890f4badb8d8d2aca5e0fc41c27b","last_seq":208,"n":7,"prev":"d98a261256ba94d3562482f6982a51623b4febc29a2d5433a7413fa6aba8ada3","root":"3d094c52131aa7c4d2b0c535f8748bedef1ce0d517127fdf4f226eb7208cae7c","sig":"eeKNPlJGHj6rFzgLA7rBXL9SZQMHMcTbvuzi/LFv7AOtlVImW4hU5Akj/4FiM9fM7nsKgdTZM0UgtgBWnAhGAw==","tree_size":208,"utc":"2026-09-30T00:09:50.680113Z"}

000008.json

{"btc":{"hash":"000000000000000000021b4b2a9c3a8fe297efd53e0e0b9c33b61f7f21c573d1","height":969367},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"0e12badda736a09670641e118f3b46fc4f4f78f4cf7976020160040c62821dc4","last_seq":211,"n":8,"prev":"9927e7dbacfb92bb590191e6d0a330d4f1a9ad4a17b32b3b8ca7d5f4be2dbf7b","root":"0c289c203ec9f2c2f32b2895c35422dbdbfd35ff95821cded55b17ae2a78dc75","sig":"UlBd6MVH7RVCTb/gYT/zFcJtSuShNGO5/gBikSqBxWJBc8WwR06Z5GPX0+J2XkLnSHOxeu1w1wZiki1LDwrKBQ==","tree_size":211,"utc":"2026-10-01T00:10:00.278257Z"}

000009.json

{"btc":{"hash":"000000000000000000021c399abb83b40163367747e321cf1c41fb9c37742ddc","height":969503},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"4cfa8cb1bfb527399fe3cb27f2642c54a127396926d7a43af5c3393f800a3b49","last_seq":234,"n":9,"prev":"58b8dca576571d6b0153d856a8311c104b78c3b1c8ea48e0e55ad471479048e2","root":"40448ffa55a9b9aebd2ea863549235fd07e35ef1eb49cb9feca6ce374108f0c2","sig":"fSYDn5AxbCVeqb/Zu6Bm3eTxNe2ZOaMt8c7VCizVyPebkGdcb8bigsjNrP8Ge6LHqwy8eXHOn/lOMoBmWfJ/Dg==","tree_size":234,"utc":"2026-10-02T00:09:50.691052Z"}

000010.json

{"btc":{"hash":"000000000000000000003e2e19f98eb74dcc6cc72b1b8fda0ce6aa6dc69059de","height":969646},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"5c1bd91b493cb2e1e9b4b0f2780d62b9faada13e8cdc0a8c4361e7bff71cf058","last_seq":243,"n":10,"prev":"194b405dc88f99b63cc6b05f2d68bca9d046247947fef1ce5a963ad0bafb96e8","root":"6421a2760efef75423ac7ca8ff1eab256bd1d1051fe7301b16c2763b606a0446","sig":"Oq19hrpQOdkg3WRJ2uC4RMHNG3+fV56j44D/ZE8Pn/Gfn/eStDY+gUPpjhHsLXe8JyHX4rNQtvSEdzzuEEPYCA==","tree_size":243,"utc":"2026-10-03T00:09:50.756599Z"}

000011.json

{"btc":{"hash":"000000000000000000003a2ca37e47607a8f2aa0ddc296786bcdafee61507b34","height":969778},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"efee9079907a243f13cb8b997b5bde4915dd21bd9c545d9e38356e78e75834b1","last_seq":244,"n":11,"prev":"8728b37fae177d804e2f1b86a35325403ce802c137c97dfcdee3eece17cbf079","root":"8103a465a3a3325987043cf6d29ba6e213e3b3eda026f83ceac7978c8b613976","sig":"TDzazXRrt97oQZnQs7zhZ0KPitWcMQ1Vw+HKoVBtqsyTgcCJdDoyAsqZ4lAPp0gp4dy1O7ag0I7CiZ1H77yeBg==","tree_size":244,"utc":"2026-10-04T00:09:50.725068Z"}

000012.json

{"anchors":[{"bank":"Swissquote Bank SA (Swiss bank)","booked":"2026-09-28","reference":"1182684937","title":"MROOT 2026W39 9f1babe3 064904b9 bc292162 083beab4 ba970f27 0cf33e6b 3009fc6b f190da43","week":"2026-W39"}],"btc":{"hash":"00000000000000000000afb04c1d8ade9de7bd71ec3acd1c8584dfbabadfa4ad","height":969921},"dump":{"file":"2026-W40.jsonl","sha256":"6d7bd76a11cd7a2d846d43a6ca36bcb34d3d3fe7cf257c95cd720f2c7ea33706"},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"weekly","last_chain_hash":"cd93dfdd23cc01d83d38849812c38c482c495ad8d5a502d160a0a15dff39ff9d","last_seq":261,"n":12,"prev":"167550993c0e583c5224e80dff58de0f65ad06363bafe17ff3140fffe766d275","root":"0c20d50ba9b06d9d2499bf682dc07bf788b5a8da442723ca50d59b1f92a558c1","sig":"gNqW2zxFjhBjxsvLrxSHDlPiY1EGzImklUlBZrTZNeqJSytSyx+aCBKjQkUs8gr/kDt8zI3Q47BoEO1ej19xAQ==","tree_size":261,"utc":"2026-10-05T00:09:50.778557Z","week":"2026-W40","week_root":"ccb1f0960ef9f2cbed59c6baa5272a738ee258aabc3e1739c1bdce362d7b9598","week_size":70}

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