thumb|Photo of David W. Conde David W. Conde, or William David Wellwood Conde, (1906-1981) was an American author, journalist, and film censor who worked in occupied Japan. Born in Ontario, Canada,
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 0x7c70fe1238216b3a3aa71244d23cbd04ced312697507a01092801972af7adc6b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75985f82-7733-458f-b8e4-fa3a003e8b8f.json and https://artists.proofprofile.net/proofs/artist/75985f82-7733-458f-b8e4-fa3a003e8b8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).