Adam Harasiewicz (born 1 July 1932) is a Polish classical concert pianist. Biography Harasiewicz was born in Chodziez. After studying violin for two months, at the age of 10 he began piano study, a
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 0x5e3940da265a165b930e41ed0574c4b5532712f3d209a8aa18bffa6fe9264f35. 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/e7a49991-23bf-4eaf-bbc7-ca0e745bec59.json and https://artists.proofprofile.net/proofs/artist/e7a49991-23bf-4eaf-bbc7-ca0e745bec59.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.