Open TA

Trust accounting for Australian legal practices.

The site is being built. There is nothing to see here yet, and nothing on this page is an offer or a representation about the product.

A trust ledger you can check

Post a receipt, alter a recorded amount, then verify. The verification recomputes the hash chain in your browser and fails when the record has changed.

Demonstration ledger — sample dataMatter 2026-0412 · trust

Trust ledger for a sample matter, showing each entry and its hash chain link
Checked	Date	Document	Particulars	Debit	Credit	Entry hash
	2026-07-06	001041	Funds received on account of costs and disbursements		5,000.00	908995820361…90899582036101a1ee2236f1410dc27a61d5a780e25b8cb2214e52b246acf953
	2026-07-09	EFT-20260709-002	Land titles office search fees	88.00		3a521d5f9ff3…3a521d5f9ff3ec2ca8536ca0989741cc52052f43c7f0344606eb2936f0c0368f
	2026-07-21	001042	Further funds received on account of settlement		2,500.00	62324737ea27…62324737ea27275ba89dd9b1feb7b2f4968466b8f2c2e6255a7f27932e20ca72
	2026-07-31	JT-20260731-014	Transfer to office account for costs, invoice 3312	1,320.00		b1c44584b29f…b1c44584b29fa8864ba2f2da443d84580248c2756443547197bc0cd9ad2f0e9c
Trial balance					6,092.00

Verification recomputes every link with SHA-256 in this browser. Nothing is sent anywhere.

# The API call this ledger is a client of.
# Sandbox not open yet — this is the shape, not a live endpoint.
curl -X POST https://api.open-ta.com/transactions \
  -H 'Idempotency-Key: 5f2c…' \
  -d '{"type":"Receipt","businessDate":"2026-08-04",…}'