Pith Number

pith:ZK5LKDKA

pith:2015:ZK5LKDKAUSC5JULP3DWJQYJ5WG

not attested not anchored not stored refs pending

Quasars can be used to verify the parallax zero-point of the Tycho-Gaia Astrometric Solution

Daniel Michalik, Lennart Lindegren

arxiv:1511.01896 v2 · 2015-11-05 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZK5LKDKAUSC5JULP3DWJQYJ5WG}

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	2026-05-18T01:21:52.025255Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cabab50d40a485d4d16fd8ec98613db1be9e1d36f9ec311f7aa24789e6760d76

Aliases

arxiv: 1511.01896 · arxiv_version: 1511.01896v2 · doi: 10.48550/arxiv.1511.01896 · pith_short_12: ZK5LKDKAUSC5 · pith_short_16: ZK5LKDKAUSC5JULP · pith_short_8: ZK5LKDKA

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/ZK5LKDKAUSC5JULP3DWJQYJ5WG \
  | 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: cabab50d40a485d4d16fd8ec98613db1be9e1d36f9ec311f7aa24789e6760d76

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6899a0d985c3197a954c20583560e3b7b81f6a93b9f4c77ab4e3ddb23d8dcb3a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2015-11-05T21:00:01Z",
    "title_canon_sha256": "8c47550e7354e167cf0ff08fe8a0bfc14f2eaa9a610b79bff99b0f6ecadcb51c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.01896",
    "kind": "arxiv",
    "version": 2
  }
}