Hana Blažíková (born 2 December 1980) is a Czech soprano and harpist. She is focused on Medieval, Renaissance and Baroque music, appearing internationally. She has recorded as a member of the Bach Col
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 0xd2c39ead7f8d64df1c3d23d1cc2b312d05e37dd8f93357bdbc5571596ff23abe. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72557926-b121-43f0-bb90-f4700d5956f7.json and https://artists.proofprofile.net/proofs/artist/72557926-b121-43f0-bb90-f4700d5956f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Michna: Czech Marian Music - Lilly Among Thorns