Gutkind is a surname. Notable people with the surname include: Diana Gutkind, English Pianist and keyboardist. Eric Gutkind (1877–1965), German Jewish philosopher Erwin Anton Gutkind (1886–1968), Ger
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 0xa7a3b7a0444f328933add07e229171c5330782ce66838fee60035f27add8089f. 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/5347cf23-1473-4320-b092-e48097c04b76.json and https://artists.proofprofile.net/proofs/artist/5347cf23-1473-4320-b092-e48097c04b76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).