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 0x77620950e57020185ce6936e1ca0fb76070b7e935a4c5d45ab2f081f8084ac69. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41a5ae67-b129-43cf-9a5d-47ff0b7b1397.json and https://artists.proofprofile.net/proofs/artist/41a5ae67-b129-43cf-9a5d-47ff0b7b1397.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Who Is The Queen On The Red Sofa? (Slow Version)