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primary_registry · Identity and registry

Source registry selected as the canonical record, using a sources.code value such as clinicaltrials-gov, eu-ctis, eudract, isrctn, or drks.

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Identity and registry
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Meaning

Source registry selected as the canonical record, using a sources.code value such as clinicaltrials-gov, eu-ctis, eudract, isrctn, or drks.

Primary registry selection is deterministic but secondary registries can carry fresher or richer fields.

Export shape

trials fieldjson
{
  "primary_registry": "clinicaltrials-gov",
  "_provenance": {
    "primary_registry": {
      "source": "clinicaltrials-gov",
      "source_url": "https://clinicaltrials.gov",
      "effective": true
    }
  }
}

Provenance

Field provenance follows the dataset contract: values are source-qualified, and records not cleared for the paid release stay out of commercial snapshot/API responses. Each release probes a bounded sample of this field's advertised evidence links; the check outcome is shown here, and a link that did not resolve renders as UNVERIFIED rather than as resolved.

RESOLVEDevidence link: 40 sampled clinicaltrials-gov/drks/eu-ctis/eudract/isrctn links resolved at the 2026-11-02 check

Selected from the registry record chosen as canonical for the resolved trial.

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