John Sachs (born 3 May 1957) is a British commentator, television presenter and voiceover artist. He narrated the original series of Gladiators, and was a longtime DJ on London's radio station Capital
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 0x8201b20f8c58df8177d0711251e71dadd9653c6cd8827e82f80c262790d1948c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0aab2526-50a8-4152-95a8-6e5fb9907833.json and https://artists.proofprofile.net/proofs/artist/0aab2526-50a8-4152-95a8-6e5fb9907833.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).