Merc or MERC may refer to: Merc Merc (MUD), a text-based online game software platform Merc (role-playing game), 1981 Merc (script) or Meroitic Cursive, derived from Demotic Egyptian Merc: 2000,
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 0x309290a9b04c25d2a875471fad0a35c6d29447e773fe9b08766ea92a1c82e5cc. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/989a100f-447d-495a-be77-0d57177dd4f4.json and https://artists.proofprofile.net/proofs/artist/989a100f-447d-495a-be77-0d57177dd4f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).