__NOTOC__ Harmon may refer to: Places Canada Ernest Harmon Air Force Base, also known as Harmon, a former United States military installation Harmon Links, a golf course in Stephenville, Newfound
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 0x021bb82c0b24914ea8eb4763bff7f4230c5202a1d5d7e8f75b4700fff8507937. Chain 2 (Bitcoin): anchored in block 954069 (2026-06-17T08:30:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a5866f4-c829-49e8-aa84-9dea53259641.json and https://artists.proofprofile.net/proofs/artist/7a5866f4-c829-49e8-aa84-9dea53259641.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).