Pith Number

pith:XHPRA4MI

pith:2015:XHPRA4MIUQZY23JXJBEKH5GVH7

not attested not anchored not stored refs pending

Surface-confined 2D polymerization of a brominated copper-tetraphenylporphyrin on Au(111)

Heinrich Lang, Lars Smykalla, Marcus Korb, Michael Hietschold, Pavel Shukrynau

arxiv:1502.05973 v1 · 2015-02-20 · physics.chem-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XHPRA4MIUQZY23JXJBEKH5GVH7}

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	2026-05-18T02:26:44.439948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9df107188a4338d6d374848a3f4d53fe65d918d5d41cfd28247d011de4d5fd2

Aliases

arxiv: 1502.05973 · arxiv_version: 1502.05973v1 · doi: 10.48550/arxiv.1502.05973 · pith_short_12: XHPRA4MIUQZY · pith_short_16: XHPRA4MIUQZY23JX · pith_short_8: XHPRA4MI

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/XHPRA4MIUQZY23JXJBEKH5GVH7 \
  | 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: b9df107188a4338d6d374848a3f4d53fe65d918d5d41cfd28247d011de4d5fd2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ba6cd785a668e2860695ae4e11992cad0e0716dd1281294804bd31ccf152912",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.chem-ph",
    "submitted_at": "2015-02-20T18:56:02Z",
    "title_canon_sha256": "a70cf5ddb55a8111d74fee06d7fd4c6b7a88be128b2d9152942e7b3145670bca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.05973",
    "kind": "arxiv",
    "version": 1
  }
}