Ching may refer to: People Ching, a unisex given name Ching He Huang, a food writer and TV chef Ching Hammill (1902–1925), American football player Ching Johnson (1898–1979), Canadian National Ho
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 0x6a5f94862d9aba7e8f441687d151e80d1614d9464af851320057785e4b8ed0d3. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16e9413e-16bc-4f33-be11-bd3aae6b456f.json and https://artists.proofprofile.net/proofs/artist/16e9413e-16bc-4f33-be11-bd3aae6b456f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).