Heinrich Panofka (3 October 1807 – 18 November 1887)Heinrich Panofka data.bnf.ft. Retrieved 8 February 2018. was a German violinist, voice teacher, writer on music and composer. Life thumb|Heinrich P
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 0x93ce1d51d7dfb064ed5bf2817b1fff464e8b7d0a9d620aa35ee7e351c1e4e9d4. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c034fe11-b49c-44eb-8579-1b19d0726b37.json and https://artists.proofprofile.net/proofs/artist/c034fe11-b49c-44eb-8579-1b19d0726b37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Panofka: 24 Vocalises Op. 81 Accompaniments with Melody Added: Alto, Contralto, Countertenor
Panofka: 24 Vocalises Op. 81 Accompaniments for Soprano, Mezzo and Tenor
Panofka: 24 Vocalises Op. 81 Accompaniments With Melody Added: Bass
Panofka: 24 Vocalises Op. 81 Accompaniments With Melody Added: Baritone
Panofka: 24 Vocalises Op. 81 Accompaniments With Melody Added: Soprano
Panofka: 24 Vocalises Op. 81 Accompaniments With Melody Added: Mezzo
Panofka 24 Vocalises Op. 81 Accompaniments for Alto, Baritone and Bass
Panofka: 24 Vocalises Op. 81 Accompaniments With Melody Added: Tenor