Foster MacKenzie III (July 9, 1944 – June 8, 1993), known professionally as Root Boy Slim, was an American musician and songwriter. He was born in Asheville, North Carolina but raised in Washington,
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7459d337a1c79991ec5c36a4445ebf0fc26efaca07230e0a6a2a8b1d7a3dd71f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57f6b79e-6a7e-4fba-844d-e1713957e058.json and https://artists.proofprofile.net/proofs/artist/57f6b79e-6a7e-4fba-844d-e1713957e058.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).