William Columbus Preston (May 6, 1893 – December 25, 1954) was an American football player. Preston was born in 1893 on a farm in Dade County, Missouri. He played college football for the University
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 0x824b9feed074966b42af3d0d51619de61bd08113260f0a499790de0fcd3bab36. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3af66ee9-fbe8-4c7b-bc50-9071ab6a0d1c.json and https://artists.proofprofile.net/proofs/artist/3af66ee9-fbe8-4c7b-bc50-9071ab6a0d1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).