thumb|U.S. Marines learning survival skills from a Thai military officer thumb|Survival outpost in Antarctica, designed to shelter humans from harsh environmental conditions Survival or survivorship,
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 0x32d7d35eb8294f5fd8ef96bb81f3799a42d181a6f00423c79f574f17eaf55026. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b99a4d59-305a-433d-8e17-34afc8210d1a.json and https://artists.proofprofile.net/proofs/artist/b99a4d59-305a-433d-8e17-34afc8210d1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).