thumb|collapsible trailer patented by Lloyd Jay Bontrager 1967 thumb|Jayco collapsible trailer 2004 model Jayco RV is an American manufacturer of recreational vehicles. The company is based in Middl
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 0x5f06a96cb988dc3a4905634cb2c507c19472ae3cd330c59a8618ea3c2b6ec699. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14b8d734-ed3a-4ff7-b7a6-316533c70646.json and https://artists.proofprofile.net/proofs/artist/14b8d734-ed3a-4ff7-b7a6-316533c70646.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).