alt=|thumb|A Hupa white deerskin dance by A.W. Ericson The Hupa (Yurok: / 'Hupa people') are a Native American people of the Athabaskan-speaking ethnolinguistic group in northwestern California. The
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 0xb14a67e9c69ca57e9583283961dba7adeb45832b8027cea6a428f0f7aed2c8ac. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fe07733-ff41-4710-8da2-3c1cbaaa0f84.json and https://artists.proofprofile.net/proofs/artist/8fe07733-ff41-4710-8da2-3c1cbaaa0f84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).