Checkpoints of week 2026-W43

19 October 2026 – 25 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

#36

Issued

2026-10-26T00:09:50.916417Z

File SHA-256

fb73d836b53770a7f959ccf2cb4a937866ec03b0e078f9afc66128b68f8ca22a

Global tree

tree_size 713, root 13623692a17e6ef4492c417b5a5587f811a8abca561604f0cce4a4ba5ee9d778

Last entry

seq 713, chain hash 45861c9684d4e166a8504a2134b3407990ab428969ed498ff8f71d7eb95c2b61

Bitcoin block

973148 0000000000000000000129805ed3adc367c14946a560c3a5f7cc402873c5ac72

Previous checkpoint

85a55cfadf0ac812e2e5cb90f0c83ac2f668e392f0b89817a3b86a8f57133c85

Week entries

262

Weekly Merkle root

a083f047207f54eb3a7b2f88aee324fa42bf0433fdc94ab26bd9be562316da28

Weekly dump

2026-W43.jsonl, SHA-256 08e2caf894093436fe14bb4e88f533d31412bb00af78073125f49a521cbaf96c

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-W43 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 000029.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

000029.json

{"btc":{"hash":"00000000000000000001e66b29883257a8cde5fbfe049ce13f8ec3a34574e217","height":972077},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"f989ddf859dd502613c49bb7996017b8d1b3e2b1a317713af069fad5ba8ae8d0","last_seq":451,"n":29,"prev":"acf84acdd577536fff98fddd21cf9e941ac5964864a35826682547e658e22d1a","root":"0e58ab78c7db2869d9c55ead031b4d3880a3812de2f10fce05c4f2200cb90cf1","sig":"gC9aTO3BEGzH+m9yhJ0/d9N9x1t51TfNaeWsGWjyHhaWp+d2cKy0vpwrARLAyI0hQ113ILdccFwMQXpeI31ZCg==","tree_size":451,"utc":"2026-10-19T00:09:50.914355Z"}

000030.json

{"btc":{"hash":"000000000000000000008afa806bbdbd80f41cdfbd29fa2870fc0f84f0003f55","height":972230},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"385e95eddfdafa6fd884513f6208810ea2fff0a62a0ceefee47da4c89e97641d","last_seq":466,"n":30,"prev":"71488219a0edb624dad020d9e559d79d64dcac1d60fe9efc102c33d27a3e4210","root":"939902ebc9aaef5459e055d1403ac8b5613b2c14b9c36256c21a914f7e4e5bb1","sig":"NklB8Sswd8eD5zrZEcKhnIzDfSsG8D0EBK5mRr1rftYZbsOE1budMRndSNJxbg0luDJ9L1hvYPr9wfeNRExLAA==","tree_size":466,"utc":"2026-10-20T00:09:52.121172Z"}

000031.json

{"btc":{"hash":"000000000000000000004ac4776bc9c176e4408f60682b3b4df7c14b31b633a6","height":972393},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"da4751fc0df10c5d539ca46e657d9ce3ba10aa960a3e1e49861ce655bada5cc2","last_seq":481,"n":31,"prev":"478b5942b7775b70d3f0d56853d2b21a59578f78a1f498d089841c3127548073","root":"8cfc8a7c23d3e70f836ded94f0939d83c68dc3a083eef210687f6ac619055957","sig":"Hx6+U8K0PmYMAqtUs8sBughWBGfR7nX/v1DBPUlMiuvJjmJ4LFM0/no3PlXHD9vakcPDyD08z5TDcMV6sa92Bw==","tree_size":481,"utc":"2026-10-21T00:09:50.883872Z"}

000032.json

{"btc":{"hash":"00000000000000000001d89d6500e2932a99ffc3b53c2e90f7e446e5211504f6","height":972544},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"59c8c7d5a291a552927d76c23d491c972480bce98d138247af1af051583c6061","last_seq":506,"n":32,"prev":"99c4db00c20362d905a70754302b09e7bbf759bff6bc478dc9a6704b75b4a054","root":"9cafa2d26900765f9da63cacb48094cfe8534d4b9d9dab41844ae7944f0c1a19","sig":"8nrv8nLd8MUPpQMo0pMx/rnl1nHJFMB/NvEzn0+KulRHc6Ry06Lmeky7lLZKOb23UIliZTKw6ZGYwbXfZiK6AA==","tree_size":506,"utc":"2026-10-22T00:09:50.862989Z"}

000033.json

{"btc":{"hash":"000000000000000000007b0a101a041e09577a4f1082ac9ad8278830d99cec32","height":972672},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"f6673bb7100d92b598ec6b7296fd22ab1a701eb8525352ac030f7b544bd1f6bc","last_seq":520,"n":33,"prev":"068380a009b9179e9f119fc1e8f9f3d07194b40e1653f52b62421f1ef120447b","root":"378da0bc01f42a7e0e45ebd5647f6e58f5916818429b33ee451b3820ee712db8","sig":"tklQE3C5S1enIE7CPGYmmDaU37GWFzGD6q4Q8HruHaLrmXVDmc7SW9ENgCbRggs+OSmQ+HNe19ix0nuFxcYRCw==","tree_size":520,"utc":"2026-10-23T00:09:50.899239Z"}

000034.json

{"btc":{"hash":"00000000000000000001fb15fe7a2402b800683dd3c0fa81061bd989f92afebe","height":972846},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"b4dc3c218842b08135ea866a03dd25782b4de4d877e938ffc8bdd47ee55e2b19","last_seq":668,"n":34,"prev":"3cb30f84eb96326679a22f510971412e6bc1e6dc320ae41e09d6f2c430c81620","root":"f4d1ec4b1d84617b8ddc52d38d77bd4077c40c18826dc337ae32a26c2a30e7b0","sig":"sVcHCPqby1oMXghXlSWErsVFLlW0cd4mQhVoqyBQIDKVZOr7CXSpa2zkIBBweBjV8kt935upl3OPkFuaf4w2AQ==","tree_size":668,"utc":"2026-10-24T00:09:50.897546Z"}

000035.json

{"btc":{"hash":"00000000000000000000b99fa76f32ec3b67168ae9e842ab71c6a555ac80cfc8","height":972993},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"5945d25ed462cbbba9e2bf0b1f280fe91d5d447dff58121d2b0ede22c9024092","last_seq":690,"n":35,"prev":"8a020135582ab7a44a9d26296a8c243813b672bb22dd9eb3c3393c23c189578a","root":"6c625ba0224cc48bf7ba61e2444dba4ff791cb13ea1eaf3b41b6a57c33dfbcb2","sig":"ChvHuEEX4t/uIFiGzVBl3tzpg5nW9U26I0yQzCA/Ur6E0QPflgAxmO8iP0fzRRL6/BxOnuF91OWZkRIOByeXDw==","tree_size":690,"utc":"2026-10-25T00:09:50.901949Z"}

000036.json

{"anchors":[{"bank":"Swissquote Bank SA (Swiss bank)","booked":"2026-10-19","reference":"1197184130","title":"MROOT 2026W42 276ed25a d72c37eb fccb0ed1 76de6e86 cd9f7273 d54b2579 195de738 40cef391","week":"2026-W42"}],"btc":{"hash":"0000000000000000000129805ed3adc367c14946a560c3a5f7cc402873c5ac72","height":973148},"dump":{"file":"2026-W43.jsonl","sha256":"08e2caf894093436fe14bb4e88f533d31412bb00af78073125f49a521cbaf96c"},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"weekly","last_chain_hash":"45861c9684d4e166a8504a2134b3407990ab428969ed498ff8f71d7eb95c2b61","last_seq":713,"n":36,"prev":"85a55cfadf0ac812e2e5cb90f0c83ac2f668e392f0b89817a3b86a8f57133c85","root":"13623692a17e6ef4492c417b5a5587f811a8abca561604f0cce4a4ba5ee9d778","sig":"Qgy6BDNluaQD3tc0786M4orSKxu3OIL1ucntgfPcBHxq1AAAmmZ9HAaqBQrp8yHhV4dPcIoz5TK5Zj+cTfXTCQ==","tree_size":713,"utc":"2026-10-26T00:09:50.916417Z","week":"2026-W43","week_root":"a083f047207f54eb3a7b2f88aee324fa42bf0433fdc94ab26bd9be562316da28","week_size":262}

All weeks