EXHIBIT A · TECHNICAL RECORD

Master Bathroom

Tour Session/Move-In·14 Jan 2026 · 17:30:00 UTC

1147 Stanyan Street, Apt 3, San Francisco, CA 94117

← Back to evidence

RECORD UUIDf47ac10b-58cc-4372-a567-0e02b2c3d479
§ I

Cryptographic Hash

ALGORITHM · SHA-256
SHA-256 · 256 bits · hex
003a7b d3e2 360a 3d2910eea4 36fc fb7e 44c72035d1 17c4 2d1c 183530420b 6b99 42dd 4f1b
Re-compute against the downloaded video file: shasum -a 256 master-bathroom.mp4
§ II

RFC 3161 Timestamp

ISSUED · 14 Jan 2026 · 17:42:09 UTC
Issuing Authority
DigiStamp Universal TSAwww.digistamp.com
Issued At
14 Jan 2026 · 17:42:09 UTC
Policy OID
1.2.840.113733.1.7.23.3
Serial Number
5C:3F:A1:9E:22:0B:7D:48
Download .tsr Receipt

A binary RFC 3161 timestamp token. Independently verifiable with openssl ts -verify.

What is a Timestamp Authority?

A Timestamp Authority (TSA) is an independent third party that cryptographically signs a hash with the current time. The signed token proves the data existed at exactly that moment — neither RenterSeal nor the user can forge it after the fact. RFC 3161 is the standard governing how this works, and it is the same mechanism used by code-signing CAs and notarial archives worldwide.

§ III

Location

GPS · WGS 84
37.77729°N37.77689°N37.77649°N37.77609°N37.77569°N122.41818°W122.41768°W122.41718°W122.41668°W122.41618°WN≈ 30 M
1147 Stanyan Street, Apt 3, San Francisco, CA 9411737.776492° N   122.417183° W
Address
1147 Stanyan Street, Apt 3, San Francisco, CA 94117
Latitude
37.776492° N
Longitude
122.417183° W
Source
Device GPS · OS-level mock detection passed
§ IV

Chain of Custody

  1. Recorded
    Video captured on device · GPS attached
  2. Hashed
    SHA-256 computed locally before upload
  3. Uploaded
    Resumable transfer to GCS · encrypted at rest
  4. Timestamped
    DigiStamp Universal TSA · RFC 3161 token issued
  5. Verifiable
    This page · publicly auditable
§ V

Capture Metadata

Room
Master Bathroom
Session Type
Move-In
Captured At
14 Jan 2026 · 17:38:51 UTC
Duration
1m 04s
File Size
74.8 MB
Device UID
A8F4·E712·9C0D(truncated)
Capture App
Vouch iOS 1.0.3 (build 412)
§ VI

Independent Verification

Verify this independently▸
1.

Download the original video

Save the file to your machine, then re-compute its SHA-256. The result must match the hash printed above to the byte.

curl -O /sample/master-bathroom-move-in.mp4
shasum -a 256 master-bathroom-move-in.mp4
# expect: 3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b
2.

Download the RFC 3161 timestamp token

The .tsr file is a binary timestamp token signed by the issuing TSA. Verifying it requires only OpenSSL and the TSA's public certificate.

curl -O /receipts/f47ac10b-58cc-4372-a567-0e02b2c3d479.tsr
openssl ts -verify \
  -in f47ac10b-58cc-4372-a567-0e02b2c3d479.tsr \
  -data master-bathroom-move-in.mp4 \
  -CAfile tsa-chain.pem
3.

Confirm the chain

If both checks pass, three things are mathematically true: the video is bit-identical to the one captured; the timestamp token was issued by the named TSA; and therefore this exact video existed at the moment shown above.