right|thumb|Zebu oxen in Mumbai, India thumb|Ploughing with Oxen by George H. Harvey, Nova Scotia, Canada, 1881 thumb|Oxen used for plowing, 2013 thumb|right|Boy on an ox-drawn cart in Niger thumb|Ox
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 0x05fc4239e6a6ae6356486efabc2d319186828096ce0527ade09179ba5cd059cd. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c263373-f74b-4ddc-9c6b-9c18dc722b24.json and https://artists.proofprofile.net/proofs/artist/7c263373-f74b-4ddc-9c6b-9c18dc722b24.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).