YLB or ylb may refer to: YLB, the IATA code for Lac La Biche Airport, Alberta, Canada ylb, the ISO 639-3 code for Yaleba language, Milne Bay Province, Papua New Guinea
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 0x28d3257bd2219832c5311c24b420b762137ae7f8e716996954e73d1999dfa030. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f35bfba-6150-427b-9f93-d425e16d59ec.json and https://artists.proofprofile.net/proofs/artist/7f35bfba-6150-427b-9f93-d425e16d59ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).