thumb|200px|Richard Heuberger Richard Franz Joseph Heuberger (18 June 1850 in Graz, Austria – 28 October 1914 in Vienna, Austria) was an Austrian composer of operas and operettas, a music critic, and
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 0x780fc7a7593ea6129a1583733900e51c3b515b7ef7b4e206016a87aee2522190. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cb85869-e978-48d0-8d2c-eecaf9718a06.json and https://artists.proofprofile.net/proofs/artist/3cb85869-e978-48d0-8d2c-eecaf9718a06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Der Opernball: Midnight Bells (Arr. Kreisler for Violin and Piano)
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 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 0xb6b409d71b3b948bfffbe03f5c101d705692eaea6c623cec5658457d805ab541. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBBBC2100328.
Heuberger: Der Opernball: "Im Chambre séparée" (Henri, Hortense)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b04e4539cfa07ee43bdd30fb5332fbe0eaf1b34244f1411001b2db946fad53. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC2302051.
Meine Lippen sie küssen so heiss - Operetta's Greatest Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a41e6738b8b930154d264af0ab0f805f106af5cb131807e227bb9f6ed20f17. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN960800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a41e6738b8b930154d264af0ab0f805f106af5cb131807e227bb9f6ed20f17. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEN960800270.