Checkpoints of week 2026-W41

5 October 2026 – 11 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

#20

Issued

2026-10-12T00:09:50.829655Z

File SHA-256

df810c931f9a329670cca291804eb9a7d9c4e3428bacb85ff93156f253790d83

Global tree

tree_size 363, root ff798dc5fb44cb5f02184c3b46f0dcbbe4b6346a92092245e640fbc77b12b556

Last entry

seq 363, chain hash d804fe2043c8204e0f67cb7ee8f75b3d4ceca87d58801b9c2cdaa7f3ffdfe506

Bitcoin block

971005 0000000000000000000042601b4858534f518c3fc526a6f1544a728d92f8ead4

Previous checkpoint

d65e691059154f405412c3b3753bc401af0c89f8606f5a3246eb7eb042e6ada5

Week entries

102

Weekly Merkle root

51a7d596b7fb3f732088a66e30a1720232d87b79e131372c2471e3924f2573c1

Weekly dump

2026-W41.jsonl, SHA-256 580aac63f65412b2b86f21c982a0e50f34eb16dc655a6a6beaca2a3d543b2132

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-W41 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 000013.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

000013.json

{"btc":{"hash":"00000000000000000000afb04c1d8ade9de7bd71ec3acd1c8584dfbabadfa4ad","height":969921},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"cd93dfdd23cc01d83d38849812c38c482c495ad8d5a502d160a0a15dff39ff9d","last_seq":261,"n":13,"prev":"5792a1d213797b8f909dc6a76ee8c0243c6c250742697fd96722d5236c390dd4","root":"0c20d50ba9b06d9d2499bf682dc07bf788b5a8da442723ca50d59b1f92a558c1","sig":"PK56rdzFUCwwhW+yzebUhDIgznUCH3xuZ5eW1fCcvitNxNdxGjy73DDk80mJO2oNgzCQslgHoGUBzGn56zkFBA==","tree_size":261,"utc":"2026-10-05T00:09:50.799884Z"}

000014.json

{"btc":{"hash":"000000000000000000006a337e289bf2903730866eec7f4badb76550632bf3a1","height":970099},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"13b5a4cd51c7a1d883bc7cb512a0a48544a35fc469cc6ffa1a87ab320f33ba04","last_seq":283,"n":14,"prev":"619524907d98f8a54b934513b26e59af7a3ee9119d0966d9137a24c8cdb19d56","root":"2be7e698c972bae5837c10de6f1c526fdceaa42924d54bd4f727da1140b8269a","sig":"JTgSJkG78vr9IU7KX3WQ2KI4o7w94EF9rz7HdTXOlXAuZeRcoVuxNMQ858YNdmmUHJMQcqJATrN4OjY1pHLxCQ==","tree_size":283,"utc":"2026-10-06T00:09:50.779063Z"}

000015.json

{"btc":{"hash":"0000000000000000000012dafdacfa10cf25bd5e8a1e3a6ba6d659b8c89336d5","height":970254},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"6e774dc57d8dde141793780206631206125b6785e438ab48d9e186a2b275514f","last_seq":304,"n":15,"prev":"9bc657c7a070d365ff86035f14a13dd71606103dcab6ceba905f85c83aded2f8","root":"fda9e51016f08fbbe7aa7e8d161c739776fb89451a59959f6b45c851920e2036","sig":"HqHA1J1Dy3Zte5sABizRJ/FplylWNV4iVPME9N2rgLrv7im18byt/gloEeQc6koFKaZIybRsTh9KlvI/nfZ6AQ==","tree_size":304,"utc":"2026-10-07T00:09:50.762428Z"}

000016.json

{"btc":{"hash":"00000000000000000000e9e3031f48608108b8bc132cdd94bbcfdb16137b9dd5","height":970408},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"27e59c87ee12926426c2ce3f63d831306964490c75704922bd7ded540916288f","last_seq":321,"n":16,"prev":"c48a17040c7185c45e7a29d623a4084b8a0632e5efd7b2d6b7ba5efa0050a85d","root":"74cfa4622b7a1b67c1c309ac73db696251823e44e4354dd1017759f927daecd3","sig":"UHIDg96HtKExFX95Z9U16Fw+fwpN4DW9PlafLkDF1bJL2g5pPuZrogYHOw5QnbNeo0+8NGRJXyHntD4H+G1TCw==","tree_size":321,"utc":"2026-10-08T00:09:50.830131Z"}

000017.json

{"btc":{"hash":"0000000000000000000193f7f86939c64df366ca2eb137946aa9cfb9b3588fc6","height":970547},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"32ed4b0dd6c18fb9727e41e9595cfecb3b4cdcc2ef3bef72db459512593ab319","last_seq":331,"n":17,"prev":"c9fff34beac00ad53e782d25928ecd01755a5d621cac32cd00783ce6863eb9ab","root":"a2f551388d6a734b336c97644c6ae3f437809eafa5d32efb8843c977b84bf884","sig":"lHPw5kkT32R3yaetjr/DMHd63oWZGVaL5WdsDbM+MkgOZaWA8504CUZsFaUvUagQ2/t8IYfWPvBoLu6VrIRcCA==","tree_size":331,"utc":"2026-10-09T00:09:51.044067Z"}

000018.json

{"btc":{"hash":"00000000000000000001e41d15031f673611fe149c42703c9db946e22a949ef5","height":970693},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"562b817ed5235b5db478eacd6e375d7de5a58dced0d71760b64ccdf9f16b68e4","last_seq":351,"n":18,"prev":"fd82aebfbc4aa0b5e3a7339a6a4454b51c60e810f7c302466a8147278c84779c","root":"fb51ed5f3a2c4fdcf03f9e71c72569f0200da15fe124db08bf87a92e3af1cd2d","sig":"Mb8bo8cvQFEKBpyTZrruRFF3hZ5jlMzhLWGS0HAOFYN3cfkbbfflrfu9n1/DZl4B2EQ1K3to2GdfDHPfouZUAw==","tree_size":351,"utc":"2026-10-10T00:09:50.795510Z"}

000019.json

{"btc":{"hash":"000000000000000000004629c23786531a9e612774d13deaf4ea9e8f515728af","height":970847},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"daily","last_chain_hash":"123532fc04400611ac334486ba688532d874a5b897b448ba922f0bb740923c60","last_seq":357,"n":19,"prev":"7a053d26832b3961c5d7e1ebceb41a947491168c3b571a5b1623cee534d54f5e","root":"c48f0c581c2f3e84962ad4041df3119e58eecd59543b7edec91c794a354b67f4","sig":"3xN2eIc8OW6GRBdvMmeP3BKUi1YFL0JVgPgLlmiKGh1Z0bsOjqByuQc2GIGR4ncZNwEuOEJptSXAFZSF5g+WAg==","tree_size":357,"utc":"2026-10-11T00:09:50.785593Z"}

000020.json

{"anchors":[{"bank":"Swissquote Bank SA (Swiss bank)","booked":"2026-10-05","reference":"1188812283","title":"MROOT 2026W40 ccb1f096 0ef9f2cb ed59c6ba a5272a73 8ee258aa bc3e1739 c1bdce36 2d7b9598","week":"2026-W40"}],"btc":{"hash":"0000000000000000000042601b4858534f518c3fc526a6f1544a728d92f8ead4","height":971005},"dump":{"file":"2026-W41.jsonl","sha256":"580aac63f65412b2b86f21c982a0e50f34eb16dc655a6a6beaca2a3d543b2132"},"format":"beattime-checkpoint-v1","key":"e7y9THJIUKvNKOZHmdBjJ8E0bOKyBFVxxMpAJ8w574Y=","kind":"weekly","last_chain_hash":"d804fe2043c8204e0f67cb7ee8f75b3d4ceca87d58801b9c2cdaa7f3ffdfe506","last_seq":363,"n":20,"prev":"d65e691059154f405412c3b3753bc401af0c89f8606f5a3246eb7eb042e6ada5","root":"ff798dc5fb44cb5f02184c3b46f0dcbbe4b6346a92092245e640fbc77b12b556","sig":"36w7ld+a4bf+oj9lMhTL7qjgMelNmf9wvnSAn6t2Hs4GhX8jWt3Y4iQ5l2HAWVBgslk5moelEW8w7Qu4DXW6Dg==","tree_size":363,"utc":"2026-10-12T00:09:50.829655Z","week":"2026-W41","week_root":"51a7d596b7fb3f732088a66e30a1720232d87b79e131372c2471e3924f2573c1","week_size":102}

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