The public record

Check a ledger entry yourself.

Every join, task, check and settlement on the network is an entry in a hash-chained ledger. Each day’s entries are summed up in one signed root, and that root is fixed on a public test chain where nobody, UAIN included, can change it afterwards.

Enter an entry’s number. Settlements and awards are entries too; entry 1572, for example, records the Karma awarded for contribution RC-4578.

What each check means

The entry is a leaf of its day. Its hash is one of the hashes the day’s Merkle tree is built from.
The path reaches the day’s root. Hashing the entry with its neighbours, level by level, gives exactly the day’s root.
Signed by UAIN’s ledger key. The root is signed with the server’s Ed25519 key, checked against the copy pinned in this site rather than the one the server hands out.
Anchored on Base Sepolia. The contract LedgerAnchor accepts each day once, in order, and never again, so a rewritten day would no longer match.
Mirrored on Solana devnet. One memo per day, carrying the signed root and its signature, as a second, independent timestamp.

What this does not prove

It proves the entry has not changed since its day was anchored. It does not prove the work behind the entry is right: that is what members’ checks are for. Days are anchored after they end, so an entry from today shows “not yet”. Both chains are test networks, and nothing here has monetary value.

From the command line

The same check, plus the contract’s exact bytecode, from a copy of the repository, with the ledger key pinned from the ledger-roots branch:

cd contracts && npm ci && npm run build
git show origin/ledger-roots:ledger-public.pem > /tmp/ledger.pem
LEDGER_PUBLIC_KEY_FILE=/tmp/ledger.pem \
LEDGER_OWNER_ADDRESS=<owner> LEDGER_ANCHOR_ADDRESS=<contract> \
BASE_SEPOLIA_RPC=https://sepolia.base.org \
SOLANA_RPC=https://api.devnet.solana.com SOLANA_MIRROR_ADDRESS=2ymaG8ARXvySwgniQTfNmpADcoiqGTk9wcQr3FohMoKZ \
  node scripts/operations.mjs prove --id 1572