(Latin for "in Nature") is a phrase to describe conditions present in a non-laboratory environment, to differentiate it from in vivo (experiments on live organisms in a lab) and ex vivo (experiments
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 0x6e0adab006920f2d35878ba0e8eb2058f47e5c95aa8f526d42b78ed2eaef3bd9. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6883a74-fbf1-44b3-a36d-f8c6da5a636d.json and https://artists.proofprofile.net/proofs/artist/e6883a74-fbf1-44b3-a36d-f8c6da5a636d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).