thumb|The supermoon of 14 November 2016 was away from the center of Earth. Supermoons occur 3–4 times per year. thumb|As the Earth revolves around the Sun, approximate axial parallelism of the Moon's
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 0x8e37e0184f465f1dac6944308ba0b8ccad1af5ab229c8cc72f83523496edfbf9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8713f2ea-7639-4be6-9994-79d42cac823a.json and https://artists.proofprofile.net/proofs/artist/8713f2ea-7639-4be6-9994-79d42cac823a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).