William E. Williams, also known as El Da Sensei is an American rapper from Newark, New Jersey. During the 1990s he was a member of the hip-hop duo, Artifacts. Since then he has released several solo
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 0xb7a57e20cb92e82c2878b08fe3986ce69bd5762fe32794d26eac538f3d38f23e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9d59309-b32e-4539-9b8d-0878f5a539f3.json and https://artists.proofprofile.net/proofs/artist/c9d59309-b32e-4539-9b8d-0878f5a539f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).