Leska may refer to: Places Leskë, a village in Albania Leska, Kyustendil Province, a village in Bulgaria Leska, Croatia, a village near Delnice People Anna Leska (1910-1998), Polish pilot, 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 0x077c337e9c6ce41a56107a1d643f1d5892c93966c3cc9ee415fe210f07c7297b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe3fb3de-585b-4d1e-b8ab-05b93e931289.json and https://artists.proofprofile.net/proofs/artist/fe3fb3de-585b-4d1e-b8ab-05b93e931289.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).