Pith Number

pith:RPYDNACF

pith:2000:RPYDNACFHVBMLHRN5F5JWE6SNM

not attested not anchored not stored refs pending

Many uses, many annotations for large speech corpora: Switchboard and TDT as case studies

David Graff, Steven Bird

arxiv:cs/0007024 v1 · 2000-07-13 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RPYDNACFHVBMLHRN5F5JWE6SNM}

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	2026-07-04T14:24:03.583689Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8bf03680453d42c59e2de97a9b13d26b1740170ff632f2dbeaa207c481a26308

Aliases

arxiv: cs/0007024 · arxiv_version: cs/0007024v1 · doi: 10.48550/arxiv.cs/0007024 · pith_short_12: RPYDNACFHVBM · pith_short_16: RPYDNACFHVBMLHRN · pith_short_8: RPYDNACF

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/RPYDNACFHVBMLHRN5F5JWE6SNM \
  | 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: 8bf03680453d42c59e2de97a9b13d26b1740170ff632f2dbeaa207c481a26308

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81336b4611abe080ad386fcf8be55fb1eb7615a295a6b2bee986bf168e8edeba",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.CL",
    "submitted_at": "2000-07-13T18:51:48Z",
    "title_canon_sha256": "22e9d21070f3e030185de5fe06c1c5b8a842658714500829101a54fcda215adf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0007024",
    "kind": "arxiv",
    "version": 1
  }
}