John Andrews may refer to: Sports John Andrews (baseball) (born 1949), American baseball pitcher John Andrews (cyclist) (1934–2000), British cyclist John Andrews (footballer, born 1950), English f
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43890f680977ed25507a820c96909c6c28ea1abc9c6946d46907c3bc72357f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74b2a7ef-1ee3-4a69-9fb5-cafce9275a69.json and https://artists.proofprofile.net/proofs/artist/74b2a7ef-1ee3-4a69-9fb5-cafce9275a69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).