Omar Ahmed Abdelkader (born 29 December 1979) is an amateur boxer from Kenya, who is also known as Omar Ahmed, Ahmed Abdelkader, or Ahmed Rajab Omari. He is best known for winning the gold medal in th
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899efac8c7fce8066bb9ab462af09f5394906ac944c4bf92e33166cfcb11fe1f. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd4e214a-8acd-40f4-994a-59fb24f23a21.json and https://artists.proofprofile.net/proofs/artist/fd4e214a-8acd-40f4-994a-59fb24f23a21.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.