Dave Bradley (February 13, 1947 – October 1, 2010) was an American professional football guard in the National Football League (NFL). Biography Bradley was born David Earl Bradley on February 13, 194
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 0x3393c4bf6e69a3f891fdb7caf162f4f1fe155aa50c8a166583d280bcc13886e8. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10885b84-044c-441d-80c5-41b175135dbe.json and https://artists.proofprofile.net/proofs/artist/10885b84-044c-441d-80c5-41b175135dbe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).