Obj or OBJ may refer to: Entities Ottawa Business Journal, a weekly business publication in Ottawa, Ontario, Canada People Odell Beckham Jr. (born 1992), American football player, nicknamed OBJ O
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 0x892913e07ccaeed0dd6311a2133313b3a79d9d9df9d98ebd9983b9abd4beff1f. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a4ab1af-25aa-418d-b4d6-fbe7b30f0376.json and https://artists.proofprofile.net/proofs/artist/9a4ab1af-25aa-418d-b4d6-fbe7b30f0376.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).