thumb|The "Swoosh" logo The Swoosh is the logo of American sportswear designer and retailer Nike. It is one of the most recognizable brand logos in the world, and the most valuable. , the Nike brand w
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 0xce9ccdb7547cc4dd9921c4305d6cf4eed1d6e2cf816e23cfb943a4a499a8dfd6. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23204434-bae0-4327-b784-db554c51a705.json and https://artists.proofprofile.net/proofs/artist/23204434-bae0-4327-b784-db554c51a705.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).