LDR may refer to: People Lana Del Rey, American singer-songwriter Politics Liberal Democrat and Reform Party, European Parliament Laos Democratic Republic Local Democracy Reporter, United Kingdom
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 0x39f064ccfaf6f2d25d2d69356756ed223a75257b0962df54571a54e76aa482ba. Chain 2 (Bitcoin): anchored in block 953722 (2026-06-15T01:21:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b220b7b-5250-4281-aff4-fac0c96814d2.json and https://artists.proofprofile.net/proofs/artist/8b220b7b-5250-4281-aff4-fac0c96814d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).