Pith Number

pith:ZC4E2F2A

pith:2011:ZC4E2F2A6GZB5CSXBVJUPCF7V2

not attested not anchored not stored refs pending

SIP APIs for Voice and Video Communications on the Web

Alan Johnston, Carol Davids, Henry Sinnreich, Kundan Singh, Wilhelm Wimmreuter

arxiv:1106.6333 v1 · 2011-06-30 · cs.NI · cs.MM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZC4E2F2A6GZB5CSXBVJUPCF7V2}

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	2026-05-18T04:19:03.566144Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8b84d1740f1b21e8a570d534788bfae8753a546189d5558624f71a8aa64cd58

Aliases

arxiv: 1106.6333 · arxiv_version: 1106.6333v1 · doi: 10.48550/arxiv.1106.6333 · pith_short_12: ZC4E2F2A6GZB · pith_short_16: ZC4E2F2A6GZB5CSX · pith_short_8: ZC4E2F2A

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/ZC4E2F2A6GZB5CSXBVJUPCF7V2 \
  | 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: c8b84d1740f1b21e8a570d534788bfae8753a546189d5558624f71a8aa64cd58

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad21ac3223d801c69169472b454edb4b3148d3cb84a82c522203215e61aa1360",
    "cross_cats_sorted": [
      "cs.MM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NI",
    "submitted_at": "2011-06-30T18:40:48Z",
    "title_canon_sha256": "fdcd1afcb0a4a8170ff9e9dbe6003a8a67f6cacada12123f5fdcab926837dcd0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.6333",
    "kind": "arxiv",
    "version": 1
  }
}