CMAX is a bus rapid transit (BRT) service in Central Ohio, operated by the Central Ohio Transit Authority (COTA). The line begins in Downtown Columbus, traveling northeast to Westerville. CMAX is Cent
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 0x8ce32104993f9de07256338a1aaea5dd68459b2160c4969ead918efc03fd7291. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82de6169-c52b-4ee4-8ac2-c9aad0b8daf4.json and https://artists.proofprofile.net/proofs/artist/82de6169-c52b-4ee4-8ac2-c9aad0b8daf4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).