Microsoft Hohm was an online web application by Microsoft that enabled consumers to analyze their energy usage and provided energy saving recommendations. History Announced on June 24, 2009, Microsof
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 0x22898e347166c89264d596b2ab8510a4be0c7f1afb663066d524a2cf41250d4c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99d44156-ce79-4e64-a58f-c8813d3385e0.json and https://artists.proofprofile.net/proofs/artist/99d44156-ce79-4e64-a58f-c8813d3385e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).