David Anthony Guy (born December 9, 1978) is an American trumpet player. Since 2014, he has played with The Roots, including on The Tonight Show Starring Jimmy Fallon. Over his more than two decade ca
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 0x1913140507093cec6746cc397e345db75ef550a31a0021937523388874b0e8a0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2461e782-44c8-409c-9138-c11e7e568f30.json and https://artists.proofprofile.net/proofs/artist/2461e782-44c8-409c-9138-c11e7e568f30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).