Blanca (meaning "white" in Spanish) may refer to: Locations United States Casa Blanca, California or Blanca, a former unincorporated community Blanca, Colorado, a Statutory Town Blanca Peak, a mount
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 0x243e71d03a01060fc0d36eab7318334e5d0876b9ef4767b0e993df6853b969cc. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3a494a0-b337-4194-96e6-09571ff6abba.json and https://artists.proofprofile.net/proofs/artist/f3a494a0-b337-4194-96e6-09571ff6abba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).