thumb|upright=1.35|Model wearing a red sundress A sundress or summer dress is an informal or casual dress intended to be worn in warm weather, typically in a lightweight fabric, most commonly cotton,
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d7eb29795859a09c5a8f9e05c015b5194d67c333b16e755f2b73e4ff044725. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e94ef4cc-c5c9-4b65-8c08-7474b49e6c6e.json and https://artists.proofprofile.net/proofs/artist/e94ef4cc-c5c9-4b65-8c08-7474b49e6c6e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).