Pith Number

pith:7CDF5OG2

pith:2019:7CDF5OG2ALFCSK67BSMDCSW4Z7

not attested not anchored not stored refs pending

Passport: Enabling Accurate Country-Level Router Geolocation using Inaccurate Sources

(2) Boston University), David Choffnes (1) ((1) Northeastern University, Muzammil Abdul Rehman (1), Sharon Goldberg (2)

arxiv:1905.04651 v3 · 2019-05-12 · cs.NI · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7CDF5OG2ALFCSK67BSMDCSW4Z7}

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	2026-05-17T23:39:53.926015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8865eb8da02ca292bdf0c98314adccfc44ad142b7649e7a7ba0d2fece27d10d

Aliases

arxiv: 1905.04651 · arxiv_version: 1905.04651v3 · doi: 10.48550/arxiv.1905.04651 · pith_short_12: 7CDF5OG2ALFC · pith_short_16: 7CDF5OG2ALFCSK67 · pith_short_8: 7CDF5OG2

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/7CDF5OG2ALFCSK67BSMDCSW4Z7 \
  | 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: f8865eb8da02ca292bdf0c98314adccfc44ad142b7649e7a7ba0d2fece27d10d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3716410117c23a11211cd9b7d9b5c782a508d26fe4c5f0c49fd4626c2d2311d3",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.NI",
    "submitted_at": "2019-05-12T06:04:03Z",
    "title_canon_sha256": "e246c0b2581adc1c4e3c038a2e1b0ec76a962caa22b8c639ed6ed0337a3157c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.04651",
    "kind": "arxiv",
    "version": 3
  }
}