Pith Number

pith:QXBCLSOK

pith:2020:QXBCLSOKTYXKJD6U52WMEC4LER

not attested not anchored not stored refs pending

SonicPACT: An Ultrasonic Ranging Method for the Private Automated Contact Tracing (PACT) Protocol

Anantha Chandrakasan, Daniel Weitzner, Gary Hatke, Gerald Jay Sussman, Hari Balakrishnan, John Cohn, John Meklenburg, Louise Ivers, Michael Specter, Michael Wentz, Ronald Rivest

arxiv:2012.04770 v1 · 2020-12-08 · cs.NI · cs.CR · cs.CY

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QXBCLSOKTYXKJD6U52WMEC4LER}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T01:58:15.113269Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85c225c9ca9e2ea48fd4eeacc20b8b24545b757ab799e8903d3f26c01f39a6c4

Aliases

arxiv: 2012.04770 · arxiv_version: 2012.04770v1 · doi: 10.48550/arxiv.2012.04770 · pith_short_12: QXBCLSOKTYXK · pith_short_16: QXBCLSOKTYXKJD6U · pith_short_8: QXBCLSOK

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QXBCLSOKTYXKJD6U52WMEC4LER \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 85c225c9ca9e2ea48fd4eeacc20b8b24545b757ab799e8903d3f26c01f39a6c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f419029e29248741ec79e21e094767468b16841f3d3db3b5c5c0eb3cbde863ff",
    "cross_cats_sorted": [
      "cs.CR",
      "cs.CY"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.NI",
    "submitted_at": "2020-12-08T22:33:39Z",
    "title_canon_sha256": "8f40a5b45c4ef2290aafb1ef7960ea043971a0f8343933fc06b7f5c09a0e543a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.04770",
    "kind": "arxiv",
    "version": 1
  }
}