Bob Baker or Bobby Baker may refer to: Bob Baker (actor) (1910–1975), American singer and actor Bob Baker (American football) (born 1927), American football coach Bob Baker (basketball) (1919–1950
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 0xdf9e64eda1abb776caffbad884d55cd034ef10df7cff199d332dfc6648c26f10. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/258998e8-6562-4b1e-ac72-b81646cf601f.json and https://artists.proofprofile.net/proofs/artist/258998e8-6562-4b1e-ac72-b81646cf601f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).