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 0xc8d541242ef49739593d00f04cc61163df3ce214f38ff9a8580569635abb0450. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d1bd722-00fe-4709-8347-b3bb2cf1fb8e.json and https://artists.proofprofile.net/proofs/artist/0d1bd722-00fe-4709-8347-b3bb2cf1fb8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vocal Recital: Gigli, Beniamino - Toselli, E. / Crescenzo, V. De / Donaudy, S. (Archivio Della Romanza Da Salotto Italiana, Vol. 2) (1926-1947)
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 0xb7b42c5a98ad965c218991094faa8a9d31bce2a58b06a5c307f1036e182f1344. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USB8U1004758.
The Beniamino Gigli Collection, Vol. 1: The Film Songs (Remastered 2014)
Glamourwelt Berlin, Vol. 1: Berliner Operette mit ihrem größten Stimmen (Berlin Operetta From the Weimarer Republik to the Second World War) (1927-1941)
Musik und Liebe: Mir hat ein Marchen heut' getraumt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6202f5d45b767c362b8df09c2050ce39dd991d7e5c5251a869700fd6804b48ba. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEL111200435.
Glamourwelt Berlin Vol. 5 (1926-1942) From the "Weimarer Republik" to the Second World War - The songs of old Berlin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db781965ac39772f9a397301327297f18845a4fe5a16968e942547fa5e76acc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEL111200492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02beeda85f430a090bed8faf17433d322d137caa4fa6294f736325ee4d8bc91b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEL111200493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44668d1afda883eaa621942efb54ff2c3d09eb795940aec9c32fd757ea0572c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEL111200499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0321a58370594cd513982a0fbf23eb0c2bcf38f5dc9cf5edd2dbd415663a6e6d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEL111200508.
Immortal Voices of German Radio: Walter Ludwig – Tausend Rote Rosen Blüh'n (Recorded 1932-1936) [Remastered 2017]
Beniamino Gigli, Vol. 5 (Recordings 1925-1939)
History of German Film Music, Vol. 6: We Make Music (1940-1942)
Die Meistersinger von Nurnberg (1919-1930)
60 Hits der 40er Jahre - 1940 bis 1944 (Das waren unsere Schlager)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3d4fe861225d6c6d4100198ecbb768204199fbbcb10ec24a34a2305b56a1ef. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEHB51206711.
Paradis / Arr. Dushkin for Violin and Piano: Sicilienne in E-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b64009983c5628c2446df1303108418d7fd1b2937a9dd74e4941317d14cb48d. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEA621802040.