Missing or The Missing may refer to: Film Missing (1918 film), an American silent drama directed by James Young Missing (1982 film), an American historical drama directed by Costa-Gavras about the 19
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 0xdbe67ea13beea9b96820701e69253078e3ff37f78be6278e1dba5f79e6c3fe52. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f84d290-eb56-4757-b273-a5519b84bde1.json and https://artists.proofprofile.net/proofs/artist/2f84d290-eb56-4757-b273-a5519b84bde1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).