thumb|Moses and his Ethiopian wife Zipporah (Mozes en zijn Ethiopische vrouw Sippora). Jacob Jordaens, c. 1650 The word Cushi or Kushi ( colloquial: ) was racial terminology used in the Hebrew Bible
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 0xbcc3bc6b71bd5ff328e3b38e00bcedefa67b8091e6bbfd1980b2da2c2b0db4c0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e4b6ea2-a5ad-4d99-ac06-cc98db08f42c.json and https://artists.proofprofile.net/proofs/artist/8e4b6ea2-a5ad-4d99-ac06-cc98db08f42c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).