thumb|Eberhard Waechter Eberhard Freiherr von Waechter (9 July 1929 – 29 March 1992) was an Austrian lyric baritone (categorized as a Kavalierbariton in the German Vocal Fach System), celebrated for
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 0x7860e5c2cb26f239dbbf001fed98b70b01c3f0ffe9742aa26ee38d84587d6787. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94c0c80c-e1d9-4e71-8975-cc09c0f05790.json and https://artists.proofprofile.net/proofs/artist/94c0c80c-e1d9-4e71-8975-cc09c0f05790.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johann Strauß II: Der Zigeunerbaron (excerpts) - "Operetta Highlights"
Die lustige Witwe (The Merry Widow) (2000 - Remaster): XIV. Lippen schweigen (Danilo/Hanna)
Eberhard Waechter/Elisabeth Schwarzkopf/Philharmonia Orchestra/Lovro von Matacic
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 0xad86382890c72d846eb0b90b6e53dacb7eb19847a91cace294d5ed1ccd43dec5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAYC0001029.