Andrzej Markowski (22 August 1924 – 30 October 1986) was a Polish composer and conductor. He was born in Lublin and died in Warsaw. He was the director of the Wrocław Philharmonic from 1965 to 1968 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 0xd56542f73e59d7ee3012732cdc1b2ead30d82577422fec136e42d338eb4841fb. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acadcdb1-d951-4b5c-bbff-12e6d50be16c.json and https://artists.proofprofile.net/proofs/artist/acadcdb1-d951-4b5c-bbff-12e6d50be16c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Andrej Wajda Trilogy (Original Motion Picture Soundtrack)