The Cape lion was a lion Panthera leo melanochaita population in South Africa's Natal and Cape Provinces that has been locally extinct since the mid-19th century. The type specimen originated at the C
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c1791778d9fe21bd4c28d9146ea75e69df176d1e0c62455802bc36e3676e8d. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23e8e5f6-a6fe-49ca-b561-93a5e33f782c.json and https://artists.proofprofile.net/proofs/artist/23e8e5f6-a6fe-49ca-b561-93a5e33f782c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).