Cha Jung-won (; born October 23, 1990), known professionally as Car, the Garden () and formerly Mayson the Soul (), is a South Korean singer. He released his first EP, Jackasoul, on September 30, 2013
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 0xa9cb56e9ee9cc715bf1520022733138a500c427d67e382b129fb6280c0e8b4f6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe4d81fd-b9ae-4ae1-9e91-e11ee77e27da.json and https://artists.proofprofile.net/proofs/artist/fe4d81fd-b9ae-4ae1-9e91-e11ee77e27da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).