Pith Number

pith:4RKPXVO7

pith:2025:4RKPXVO7AP7MBQBX7WEIKHRQYL

not attested not anchored not stored refs pending

Sub-Scalp Brain-Computer Interface Device Design and Fabrication

David B. Grayden, Sam E. John, Timothy B. Mahoney

arxiv:2504.12578 v1 · 2025-04-17 · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4RKPXVO7AP7MBQBX7WEIKHRQYL}

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	2026-07-05T10:50:18.862407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e454fbd5df03fec0c037fd88851e30c2d09c676fda04d947d965b17522574b27

Aliases

arxiv: 2504.12578 · arxiv_version: 2504.12578v1 · doi: 10.48550/arxiv.2504.12578 · pith_short_12: 4RKPXVO7AP7M · pith_short_16: 4RKPXVO7AP7MBQBX · pith_short_8: 4RKPXVO7

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/4RKPXVO7AP7MBQBX7WEIKHRQYL \
  | 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: e454fbd5df03fec0c037fd88851e30c2d09c676fda04d947d965b17522574b27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "749e293b0bcf089baa09768733ff3e796dc83ca66aed499c6b2297d6b3d1716e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2025-04-17T01:51:16Z",
    "title_canon_sha256": "c97c88a605db2766a0b54514e47bc8a5cf780db19385188dbfa7acf1b4fe4c18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.12578",
    "kind": "arxiv",
    "version": 1
  }
}