DRH may refer to: Places Dabra Airport (IATA code), Dabra, Indonesia Detroit Receiving Hospital, Detroit, Michigan Durham Regional Hospital, northern Durham, North Carolina People D. Richard Hipp (b
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 0xc8213ec70e5c3da1cd613d4b1b4ce45392ad93ba326d9bb5bcf5a1f252b5c3b6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2947f57-6371-43b6-b492-85b8457b7847.json and https://artists.proofprofile.net/proofs/artist/a2947f57-6371-43b6-b492-85b8457b7847.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).