Truman may refer to: People Truman (surname) Harry S. Truman (1884–1972), 33rd U.S. president Truman (given name) Truman Capote (1924–1984), American writer and actor Media Truman (book), a biogr
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 0x735dbd173b99f6910898febcb235f7170bedcd6cd7e7040d811cc335fadcfe5f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79b80bcb-be56-4e76-a410-d139ab7e35dd.json and https://artists.proofprofile.net/proofs/artist/79b80bcb-be56-4e76-a410-d139ab7e35dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).