thumb|Pierre de Gaillande at Cafe Kairo in Bern, Switzerland. Pierre de Gaillande is a French-born American singer, guitarist and composer. In the early 1990s, de Gaillande played trumpet in San Diego
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 0x5616e0307bedc3f8beba748b41e5c8ca65b43ba7385b16d01d3da04bc385a044. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/952975a9-3957-41e6-8144-b07c6388bd42.json and https://artists.proofprofile.net/proofs/artist/952975a9-3957-41e6-8144-b07c6388bd42.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).