KOA (short for Kampgrounds of America) is an American franchise of privately owned campgrounds. Having more than 500 locations across the United States and Canada, is the world's largest system of pri
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48725e321f7e0f4960fa9e0483e8eebbbc0f6c9621dc5e6ff0aa4f52abf9cbfc. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f65d3be-90d9-4f8f-afd9-9aa8f2d72f2c.json and https://artists.proofprofile.net/proofs/artist/4f65d3be-90d9-4f8f-afd9-9aa8f2d72f2c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).