Valensi, also spelled Valença, Valencia, al-Valensi, Balansi, Valencin, or Valenciano, is a Jewish surname of sephardic origin. According to Encyclopaedia Judaica, the surname originated in the city o
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 0x1f93ac7ed580c935257b5a4b3e077ffc3f5d3ab73479d1e41b289d186332575b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f79c9eb-d59b-47c0-924e-975f24ea65f8.json and https://artists.proofprofile.net/proofs/artist/4f79c9eb-d59b-47c0-924e-975f24ea65f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).