thumb|right|300px|A pump-action Remington 870, two semi-automatic Remington 1100 shotguns, 20 boxes of shotgun shells, a clay trap, and three boxes of clay pigeons A shotgun (also known as a scatter
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 0xa41c5b4e1ec9c5d937148fe0d1bb80f654c246bb871ad15517eae6f4f28df016. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5dc5d16d-b196-4600-b8c0-6fc374ee41a6.json and https://artists.proofprofile.net/proofs/artist/5dc5d16d-b196-4600-b8c0-6fc374ee41a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).