O.B. Buchana is an American blues singer and musician. He was born in Mound Bayou, Mississippi, and grew up in Clarksdale, Mississippi, beginning singing gospel songs from the age of eight."O. B. Buc
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 0x1d6a23e37b1690d33a24a13c0603f609eeffae77a3c5249698d3de3786380e23. 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/357cff18-a33e-471f-89c3-21cc3275eea5.json and https://artists.proofprofile.net/proofs/artist/357cff18-a33e-471f-89c3-21cc3275eea5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).