Polish Chamber Philharmonic Orchestra Sopot
The Polish Chamber Philharmonic Orchestra Sopot ( is a chamber orchestra based in Poland. It was founded in 1982 by Wojciech Rajski as the Polish Chamber Philharmonic, and since 1984 has also performe
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd458ef76758ae867fccd571a60df2bb7b1147b8dc7a0d3d7f5585ecbf774d939. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/991e7e01-680b-4352-b187-c8d9ea3bb95b.json and https://artists.proofprofile.net/proofs/artist/991e7e01-680b-4352-b187-c8d9ea3bb95b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).