right|thumb Anton Franz Josef Eberl (13 June 1765 – 11 March 1807) was an Austrian composer, teacher and pianist of the Classical period. He was a student of Salieri and Mozart. He was also seen as a
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 0x8a52329ba44aa1bf5f95283123d90637a3415056d8ad841070b1304be9c7e18d. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35998d21-1714-41a3-ad1f-9f725be07c8e.json and https://artists.proofprofile.net/proofs/artist/35998d21-1714-41a3-ad1f-9f725be07c8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eberl: Piano Sonata, Op. 27 & Variations
Eberl: Concerto for 2 Pianos & Sonatas for Piano 4 Hands
Concerto for Two Pianos and Orchestra in B-Flat Major, Op. 45: II. Marche. Trio. Marche
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 0xaa0dd967aa974e9e007e502ae01fa3a5cea1646bf7655005f856cb244f82e25a. 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/DEE862001818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756d29bf9c9fa0ad6735ff5439fe3edd89d49f0e65acd6cf789e009c31a0b00b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUFFF1800067.
Beethoven's World - Eberl, Dussek: Concertos for 2 Pianos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0dd967aa974e9e007e502ae01fa3a5cea1646bf7655005f856cb244f82e25a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEE862001818.