Byte-exact recovery receipt: frame 000511

Status: authenticated locally on 2026-07-27 and authorised by the owner for public recovery release on 2026-07-29. This unsigned receipt does not alter any historical signed release.

One emission frame from the April 2023 Truth Beam PoliePals Trailer record had a single 262,144-byte UnixFS block that could no longer be retrieved from the original pin. A numerically faithful reconstruction was published and kept every surviving byte unchanged. The complete byte-exact frame has now been recovered from a retained backup.

Recovered artifacts

The NPY is a valid C-order array with shape (1024, 1024, 3), dtype little-endian float32, and a 128-byte header. The recovered block is exactly file bytes [8,388,608, 8,650,752) of that frame.

Authentication

The result is authenticated by measurements that do not depend on the backup story:

1. ipfs add --only-hash --cid-version=0 reproduces both CIDs above. Those target CIDs were already present in public repository history at commit d294b0d53f29f31e309e3f1fa8fc4083a3f16029, before this recovery.
2. Against the published reconstruction, every byte before and after the missing block is identical. All 15,658 differing bytes are confined to that block.
3. Inside the block, 49,944 of 65,536 float32 values are already bit-identical in the reconstruction, or 76.20849609375 percent. The maximum absolute error is 1.52587890625e-05, matching the published reconstruction account.
4. The recovered standalone block is byte-identical to the corresponding slice of the recovered full frame.

The complete machine-readable record is RECOVERY_RECEIPT.json.

Availability

This recovery release includes the exact NPY and recovered block through the existing public data layer:

• 000511_bc48b046016adb2ed149471ab0f683f5a9d8dbff9cd544ba2048231c1a4007b2.npy
• lost_block_32.bin

Publication is complete only when the upload receipt records a fresh download of each object with the expected byte length and SHA-256. The original owner archive remains the custody source.

Recorder-source provenance

The local archive also retains the April 2023 recorder associated with session 1682718815. Its 777 original E/R chain records match every emission and report filename, and all 776 inter-record BLAKE3 transitions recompute without error. The public source copy, truth_beam_2023_REDACTED.py, differs from the archived file only in a security header and replacement of its hard-coded RSK signing private key with an environment-variable lookup. The archived original SHA-256 is 432f08d7a44850c1be3f682eb24e83e0469f3079de48eed546c1345b51969123.

Preservation and scope

The byte-exact frame enables repair of the decomposed public mirror. The earlier reconstruction remains published under its distinct name because it documents a useful deterministic-recovery result and the float reproducibility lesson.

The historical root CID remains QmejyJWognSYn7UhygsHuQzkDK5vY4izU9SsCL785NsHCN. Its existing CAR remains labelled partial until a complete CAR is rebuilt from the restored bytes and the root CID is independently reproduced. No historical signed manifest, signature, CID, or release byte is changed by this unsigned recovery record.

Reproduce the file checks

sha256sum 000511_bc48b046016adb2ed149471ab0f683f5a9d8dbff9cd544ba2048231c1a4007b2.npy
sha256sum lost_block_32.bin
ipfs add --only-hash --cid-version=0 -Q 000511_bc48b046016adb2ed149471ab0f683f5a9d8dbff9cd544ba2048231c1a4007b2.npy
ipfs add --only-hash --cid-version=0 -Q lost_block_32.bin