Evidence Pack v1 — Experiment 1a, Portuguese Bible Acoustography (Deterministic Acoustic Alphabet with Pitch Tier)

Public evidence layer for Experiment 1a of the Portuguese Bible Acoustography project — companion to the white paper "An Acoustic Alphabet for Oral Scripture" and to the signed Experiment 1a Closure Declaration (2026-07-30). CONTENTS (inside the zip, which preserves the folder structure):— CLOSURE/ : the signed Experiment 1a Closure Declaration, its canonical closure record, and the detached ed25519 signature (namespace bpt-experiment-1a-closure-v1)— PROTOCOL/ : the frozen protocol (prose) and its machine-readable configuration, hash-pinned before production began— PIPELINE/ : the frozen transcription pipeline (run_production_alphabet.py, production_common.py), the k=100 codebook centers, and the codebook metadata— CLOSED_LOOP_MEMBERS/ : the five frozen vocoder-side implementation members, pinned during Experiment 1a and never executed in it— CAMPAIGN_RECORDS/ : the Stage 8 campaign ledger append (agreement 1.0; 0 mismatches over 188,309 compared frames), the signed-return custody record, the Runs 1–8 determinism achievements index, the out-of-order signing ruling with its signature, and the CUDA runtime lock of the cross-machine target— FAIL_CLOSED_EVENTS/ : every governance fail-closed event cited in the white paper's disclosure table, preserved append-only exactly as emitted, plus the legacy MPS approval revocation and the archived revoked approval it binds— SHA256SUMS and a README.md with step-by-step verification instructions HOW TO VERIFY1. Verify the zip itself: sha256 b870575ebd1cd5a79e0f546d7a99afbf88408980d2d9c4edeaa2c551607478bb (514,234 bytes).2. Inside the pack: shasum -a 256 -c SHA256SUMS3. Verify the closure signature with ssh-keygen -Y verify (OpenSSH 8.2+); full instructions are in the pack's README.md. The project-user public key raw-file sha256 is e5994701e362c137219a721a11740a939a4206399acced1c24698c0ecdeea40f. Every hash in this pack was published inside signed, dated records before the pack was assembled. Readers who download these files can prove they are the same bytes the signatures committed to — evidence that does not have to be taken on trust. NOT INCLUDED, BY DESIGN: the sealed challenge (to be unsealed only at the pre-registered Experiment 1b evaluation, before witnesses); the source audio and the acoustic encodings derived from it (available to researchers on request under the audio's own non-commercial terms); large raw operator-return archives (preserved in the project archive and bound by hash in the records here); private keys. NOTE ON FILES: the authoritative README for this deposit is the one inside the zip (evidence-pack-exp1a-v1-2026-07-30/README.md). The loose README.md attached to this record describes the parent feasibility study, not this evidence pack. This deposit accompanies Experiment 1a and continues the concept preprint "Introducing Acoustography: Writing Systems from Raw Audio" (doi:10.5281/zenodo.18527987).