Compliance-grade storage: verified, tamper-evident, queryable.
Regulated records have to be three things at once: exact, provable, and retrievable — for years, on demand, for an auditor. AT-1 stores them compressed and queryable in place, with an integrity seal where a single altered byte is detected and located.
Every record is hash-chained to the one before it. Alter a single byte anywhere and the chain breaks at that record — detected and pinpointed to the exact entry. Append-only, WORM-grade, no external ledger required.
Records stay compressed and queryable: predicate/projection pushdown returns the exact original rows without a full decompress, and any query result is itself a new verified, re-queryable artifact. Find it, pull it out, prove it.
Lossless by construction with an embedded SHA-256 integrity trailer, so a 7-year regulatory archive is provably the original — and 3–7× smaller, which is the part finance actually pays for.
Built for the records that get audited
- SEC 17a-4 / FINRA — WORM, tamper-evident retention for communications & trade records.
- ESG / CSRD evidence — the underlying calculation records, signed and queryable for assurance.
- Audit & data-governance logs — immutable, append-only, with per-record provenance.
- Scientific / medical archives — byte-exact, addressable, integrity-verified.
The audit trail, in one chain
Each entry binds the previous entry's hash. Verification walks the chain and returns the first break — so tampering isn't just detected, it's located.
ledger.append({calc_id: 0, ...}) # hash-chained, append-only
ledger.append({calc_id: 1, ...})
ledger.verify() # -> (ok=True, tampered=None)
# ...a record is altered...
ledger.verify() # -> (ok=False, tampered=2) <- detected AND locatedBecause AT-1 compresses structured data 3–4× better than a general compressor, it avoids the storage and transfer energy those bytes would have cost. We issue a verified certificate of the avoided CO₂e — reported two honest ways: vs. uncompressed (the total picture) and vs. a standard compressor (AT-1's defensible marginal advantage). Signed, integrity-sealed, and logged to the same tamper-evident ledger.
Honest scope:this is a transparency metric for sustainability reporting (GHG-Protocol “avoided emissions”) — not carbon credits, offsets, or a neutrality claim. Energy factors are conservative, cited, and carry an explicit uncertainty band.
Compliance is a feature of the storage tier, not a bolt-on system.