Pith Number

pith:33VRK2E2

pith:2025:33VRK2E2I3GXYVJPBXJYKKRTYO

not attested not anchored not stored refs pending

Guess the Age of Photos: An Interactive Web Platform for Historical Image Age Estimation

Adam Jatowt, Hasan Yucedag

arxiv:2505.22031 v1 · 2025-05-28 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{33VRK2E2I3GXYVJPBXJYKKRTYO}

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	2026-07-05T11:11:08.452067Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

deeb15689a46cd7c552f0dd3852a33c392dff401ba3db6ad410cbaca170e087b

Aliases

arxiv: 2505.22031 · arxiv_version: 2505.22031v1 · doi: 10.48550/arxiv.2505.22031 · pith_short_12: 33VRK2E2I3GX · pith_short_16: 33VRK2E2I3GXYVJP · pith_short_8: 33VRK2E2

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/33VRK2E2I3GXYVJPBXJYKKRTYO \
  | 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: deeb15689a46cd7c552f0dd3852a33c392dff401ba3db6ad410cbaca170e087b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6f42337699f24befd1e9f56d3014aa00d201d6ec7615ccba80934de428f0fc8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2025-05-28T06:52:49Z",
    "title_canon_sha256": "379c62d2029a500d2f172ae57feb574a9a2d70c1783b99e0053ef139616a75ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.22031",
    "kind": "arxiv",
    "version": 1
  }
}