Every twelve hours, The Road to Autonomy Confidence Indices data is cryptographically sealed and stamped by independent timestamp services. Anyone can use our public logs to verify that a record existed at that exact time and was never altered. This is a separate, dedicated seal lineage from The Road to Autonomy Indices seal.
The published reading has not been altered since it was sealed, and it existed at the stated time, certified by an independent authority. The history is real and cannot be revised.
The seal says nothing about whether a value is correct. Accuracy is a separate question, governed by the Benchmark Statement and the methodology, which document how values are sourced, scored, and corrected. The seal is narrow by design. It proves a record is authentic and unaltered, nothing more.
At publication, The Road to Autonomy Confidence Index readings for the cycle are serialized in a fixed canonical form. That includes each index's headline, its band, and its sector pillar values. The serialized readings are hashed into a single Merkle tree, which reduces to one 32-byte root.
That root is submitted to independent Time-Stamping Authorities under RFC 3161, the Time-Stamp Protocol. Each Authority returns a signed time-stamp token binding the root to a certified time on a clock we do not operate.
Any single value can later be verified against that anchored root through a short Merkle path. This works without revealing or re-anchoring the other values.
The seal records are append-only and mirrored to write-once storage. A value altered after sealing produces a different root. The new root no longer matches the anchored token. That mismatch is what anyone can detect.
Each cycle has a permanent record page with its root, its RFC 3161 time-stamp tokens, and step-by-step audit instructions. An independent open-source tool recomputes the root from the published values and validates it against the signed token.
# install the open-source verifier pip install "git+https://github.com/AUTNMY-AI/confidence-index-verification.git" # verify a whole cycle: recompute the root and match it to the anchored token confidence-verify verify-cycle ./CYCLE_ID/ # verify a single index reading via its Merkle proof confidence-verify verify-category ./CYCLE_ID/ --index robotaxi
The verifier is open source (MIT). Read it at github.com/AUTNMY-AI/confidence-index-verification.
Latest sealed cycle: confidence-2026-06-28-1800. See the full audit log of every cycle, newest first.
The seal covers output integrity: a published Confidence reading was not altered after publication and existed at the certified time. It is built only by reading the already-sealed flagship index snapshots; it never alters or re-anchors them. The seal proves a record is authentic and unaltered, and is distinct from the question of whether the methodology is well computed.