thumb|Totality during the solar eclipse of August 11, 1999, showing the solar corona and prominences thumb|The lunar umbra on Earth during the solar eclipse of August 21, 2017, as seen from space An
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3febbcfa4494d2c8c727be758760fa8662027ea470e6d4406f075144447a9518. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87079419-ceae-4db8-abb0-22cf274d9777.json and https://artists.proofprofile.net/proofs/artist/87079419-ceae-4db8-abb0-22cf274d9777.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).