Unresolvable Identifier

arXiv:2605.18850 · detector doi_compliance · cross_source · 2026-05-20 21:46:29.662904+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.48550/arxiv.2104.08663.url:https://arxiv.org/abs/2104.08663' is syntactically valid but the DOI registry (doi.org) returned 404, and Crossref / OpenAlex / internal corpus also have no record. The cited work could not be located through any authoritative source.

Paper page Integrity report arXiv Try DOI

Evidence text

Nandan Thakur et al.BEIR: A Heterogenous Benchmark for Zero-shot Evaluation of Information Retrieval Models. 2021.DOI:10.48550/ARXIV.2104.08663.URL:https://arxiv.org/abs/2104.08663

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.48550/arxiv.2104.08663.url:https://arxiv.org/abs/2104.08663",
  "raw_excerpt": "Nandan Thakur et al.BEIR: A Heterogenous Benchmark for Zero-shot Evaluation of Information Retrieval Models. 2021.DOI:10.48550/ARXIV.2104.08663.URL:https://arxiv.org/abs/2104.08663",
  "ref_index": 31,
  "verdict_class": "cross_source"
}