H2, H02, or H-2 may refer to: Arts and media Armenia 2 (H2), a private television company broadcasting in Armenia and Nagorno-Karabakh H2 (A&E Networks), the rebranded name of the former channel Hi
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 0x4f21c2fb93f9f46d5955ccbd5d222ee8d36f06540f47e1b8015dd1c3c06c99dd. 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/74997723-5b2f-4240-80b5-d6351eb667ef.json and https://artists.proofprofile.net/proofs/artist/74997723-5b2f-4240-80b5-d6351eb667ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).