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CA licence A98765

Amara Osei · CA-MBC

Active

Reference data

Services unreachable. Showing reference data so the interface is reviewable. No figure on this page describes a real clinician.

Clinician

Name
Amara Osei
NPI
1234567893
Specialty
Emergency Medicine
Birth year
1981

Licence

Issuing board
CA-MBC
Licence number
A98765
Status
Active
Issued
01 Jun 2009
Expires
30 Jun 2027
Last verified
28 Aug 2026, 00:48 UTC
Content hash
7d3f9a2c5e8b1046f2a7c9d4

Disciplinary actions

0

No actions reported by this board or by the NPDB on the last cycle.

Anchored on chainPolygon Amoy
0x4a7f2c…7e0b94
Anchored
28 Aug 2026, 00:48 UTC
Block
14,982,331
Merkle root
0x9c1f4a…7a908c
Batch size
512 credentials

Audit trail

5 events
  1. QR scanned

    QR scanned at Mercy General, main entrance desk, verdict VALID

    off chainMercy General, main entrance desk
  2. Anchor confirmed

    Anchored on Polygon Amoy in block 14,982,331

    0x4a7f2c…7e0b94block 14,982,331root 0x9c1f…908ccredool.ledger
  3. Batch sealed

    Sealed into a batch with 512 credentials

    off chainroot 0x9c1f…908ccredool.ledger
  4. Crawl completed

    Medical Board of California returned SUCCESS on attempt 1, 812ms

    off chaincredool.loop
  5. Status changed

    Expiration date moved from 2025-06-30 to 2027-06-30. Re-anchored.

    0x8c2e5f…5d8b14block 14,402,118root 0x5b8e…1c47credool.loop

Merkle proof

Leaf index
187 of 512
Proof length
4 steps
Hashing
keccak256, sorted pairs

Leaf

0x7d3f9a2c5e8b10…7b3a9f1c6d24

  1. 010x1a4c7e9b2d5f80…a3c6e9b2d5f8
  2. 020x6b9e2c5f8a1d40…b7e0c3f6a9d2
  3. 030xe2c5f8a1d4b709…0a3c6e9b2d51
  4. 040x3d6a9c2f5b8e10…1d4c7f0b3e69

Root

0x9c1f4a7d2b6e80…3e5b1f7a908c

verified by 0x5FbDB231…64180aa3

Rebuild this proof with the OpenZeppelin merkle-tree package and compare the root against the anchoring contract. Credool does not have to be trusted for the check to be valid.