CH, Ch, cH, or ch may refer to: Arts and entertainment Television channel (sometimes abbreviated as "ch." for television and cable stations) Chaos;Head, a video game Clone Hero, a clone game versi
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 0x0ce12e567aaac0629b54f3715911df109ffae2733b53dfff85a697116269d42d. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd65baa3-44af-4d7a-8876-aad2702d89e2.json and https://artists.proofprofile.net/proofs/artist/fd65baa3-44af-4d7a-8876-aad2702d89e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).