Kissin may refer to: Kissing, the physically affectionate act of a kiss Evgeny Kissin (born 1971), a Russian classical pianist Joel Kissin, a British restaurateur Kissin, Syria, a village in cent
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 0x2fd095b040420caebea484f7323d0bc01ed5c1ff35903b8d1c809e3b13ab21af. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbbbcbef-c7c0-417b-bf67-b1ad5944a2bc.json and https://artists.proofprofile.net/proofs/artist/bbbbcbef-c7c0-417b-bf67-b1ad5944a2bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).