The Makah (; Makah: ) are an Indigenous people of the Pacific Northwest Coast living in Washington, in the northwestern part of the continental United States. They are enrolled in the federally recogn
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 0x77bba2499ba94a59e4325d11a8fb1f8037e4fafe5947e8af87582bd2b672a951. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/166790ce-1423-4067-943e-ea38152bd805.json and https://artists.proofprofile.net/proofs/artist/166790ce-1423-4067-943e-ea38152bd805.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).