John River may refer to: John River (Alaska), a river John River, the title character of the 2016 British TV series River See also John Rivers, a Tudor-era businessman who became Lord Mayor of Lond
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 0x8b25182fd79b7d2f2587a583ac6e2d62e9a7f8dafb98fb1f8b5b8586007672ae. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1328f03-e3fc-4370-bab5-ee3389c77988.json and https://artists.proofprofile.net/proofs/artist/b1328f03-e3fc-4370-bab5-ee3389c77988.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).