HTS may refer to: Military Hay'at Tahrir al-Sham, a militant group involved in the Syrian civil war Helicopter Training School, of the Indian Air Force Human Terrain System, a US military program
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 0x63f673fdf778741a610f921591da4c6fdc31c06e905227a862ce73c8dfd7139c. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d92dc45d-1606-4687-8763-b3cd9ed8b887.json and https://artists.proofprofile.net/proofs/artist/d92dc45d-1606-4687-8763-b3cd9ed8b887.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).