thumb|Double T The Double T is a logo that is the most readily identified symbol of Texas Tech University. History thumb|Original version of the Double T The Double T is generally attributed to Texa
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 0x2dbfb4b2660c1d1b576227673e5de064cc4050f49bb286388e48c23fd2113cec. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c356e55-4a01-443e-a554-78b2da4a9c3a.json and https://artists.proofprofile.net/proofs/artist/4c356e55-4a01-443e-a554-78b2da4a9c3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).