NextFluent Fieldlock

The receipt log

Every receipt that has left a Fieldlock desk is listed here by its hash and the time it was opened, oldest first. No wording, no figure and no study name is in the log. Each entry is chained to the one before, and Fieldlock signs a checkpoint over the whole chain, so the list cannot be changed quietly, by us or by anyone.

37 receipts in the log

  • Head of the chain: cb98ae67dfe32a3d691cf43c73eece8902a8d2b4a703d48ac5a3e090e50912dd
  • Checkpoint taken: 2026-11-15T00:18:09.982Z
  • Signed with key nf-2026-1

Keep today’s checkpoint. Later, take the list again, chain its first 37 entries, and you should arrive at the same head. If you do not, an entry was removed, altered or added behind you. The whole log and the checkpoint are at /api/receipt-log.

Latest entries

Fieldlock’s signing keys

Ed25519 public keys, SPKI, base64. A key is never taken off this list, so a receipt signed years ago still checks. Check a receipt.

The engines that have written receipts

Every receipt names the engine that wrote it. The engine’s name is a fingerprint of its own source, so a change to how a question is read or counted is a new engine and a new line here. A line is never edited or removed. On a desk, any receipt can be counted again today: it says whether the receipt still stands and, where it does not, whether the file, the codebook or the engine moved.