Copperhead may refer to: Snakes Agkistrodon contortrix, or eastern copperhead, a venomous pit viper species found in parts of North America Agkistrodon laticinctus, or broad-banded copperhead, a p
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 0xf199aa764c55a014a062d2858e3c47df3b6e2ef31b99a7047b1037a98d2f1ca2. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dce655f9-d9a0-4387-80b3-369642ee9aa9.json and https://artists.proofprofile.net/proofs/artist/dce655f9-d9a0-4387-80b3-369642ee9aa9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).