thumb|Tribal war on the plains. Comanche (right) trying to lance an Osage warrior. Painting by George Catlin, 1834 The term tribe is used in many different contexts to refer to a category of human so
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 0xa951beb58774e3ff715c2ccf671573baa9de6ed34e5b906716badfa47132da7c. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d6f854-fa0d-4bea-a7f4-7afcebda0d89.json and https://artists.proofprofile.net/proofs/artist/a2d6f854-fa0d-4bea-a7f4-7afcebda0d89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).