Siegfried Pank (born 24 March 1936) is a German cellist and viol player. He was a member of the Gewandhausorchester in Leipzig from 1962 to 1980, and toured with the Neues Bachisches Collegium Musicum
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 0x62cc80e0c41576ec2330065e25b6fc2ea1d60ddef31ec4e3406989cd01ddb404. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e1fb440-6b3f-4e89-8261-f8b55088e289.json and https://artists.proofprofile.net/proofs/artist/9e1fb440-6b3f-4e89-8261-f8b55088e289.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Telemann, G.P.: Overture (Suite) in D Major / Pfeiffer, J.: Viola Da Gamba Concerto / Graun, J.G.: Viola Da Gamba Concerto in D Major
Viola da Gamba Concerto in A Major: I. A tempo guisto
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4282e53b5970acbe0b0bf85faa98d0dd83727c515064e2d7c4bff8ae204cb96c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1010104.