thumb| Detail from Phidias Showing the Frieze of the Parthenon to His Friends by Lawrence Alma-Tadema (1868) Philia (; ) is one of the four ancient Greek words for love, alongside storge, agape and e
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 0x514b6cdfca0696ffcc08dbbd2a5feef62833e216e289317f69b5fa4858a2f935. 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/8d834637-1363-441c-ada5-55f871db99a3.json and https://artists.proofprofile.net/proofs/artist/8d834637-1363-441c-ada5-55f871db99a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).