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 0x4ed3b27d43c96259f8bcad4ef71b530aa140c4f7cafb538afcbda2f87f41a39d. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78159831-b9af-434d-abf5-10ca842e755a.json and https://artists.proofprofile.net/proofs/artist/78159831-b9af-434d-abf5-10ca842e755a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schlager und Filmmelodien von Walter Jurmann, Vol. 1 (Recordings 1930-1938)
Hirsekorn greift ein: Ohne Worte lass uns scheiden
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 0xf6b63c7ce08d0dfc727422f51cff45e92bde73f4e82b9087340d3f03866e6da5. 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/DEL111200698.
The Golden Age of Light Music: Childhood Memories - Vol. 2
The Golden Age of Light Music: Four Decades of Light Music - Vol. 1, 1920s & 30s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68489a77722f6e4ef917b6859bd59f4db0f51ee4f1e0bdbb3ea57b89a030854e. 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/CH6630753407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042de7d1c4ef179430ffff1c11318a9b0c095fb0dede6083286889e4eaf51d18. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6630753411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a3bbb2976141a5bb542ce97468fb3ec78349ddda9efe7ab1d16e4928f8b3e9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CH6630753412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1353b20185449c9e3d55cb6f7305c328103e8cd5365ee8ae14a54fa78d6af0. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH6630753414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff68ab5902d7a4af689e2692efb38c43686c00965771322fdb862ae002c90375. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH6630753418.
The Golden Age of Light Music: The 1930s Vol. 2 - In Town Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7475fad986073b52afc7f856ef53cf9ec482c4411ca61e2d7a5863b3b4dede8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CH6630551608.
The Golden Age of Light Music: Continental Flavour
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220050ef78f712f8ed61a65cde4694f7e73ec8df02e6182b189944b4ffc3fed3. 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/CH6630753202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181bd874003b133c3a58a0d50014deac0112311e94adeb9635cd56c28b8f23b5. 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/CH6630753218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedc90565d9ca4fa6a0f8b89f26b698ef8b09379c6ee94995c991b74d50fdec0. 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/CH6630753221.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13b295c759b030d9b562b347fec8a7b86f40d7fef8b4f8cbcf30c0e598599f4. 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/DEL111801444.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 9 (Remastered 2018)
Wilhelm Strienz singt und bekannte Orchester spielen Lieder und Melodien von Werner Bochmann, Vol. 3 (1938-1958)
Die besten Hits von Fred Raymond im Originalsound, Vol. 2 (1934-1943)
Lauf ins Gluck (Run into Happiness): Baden-Baden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec6f4dae3b3864f84e37ff0d5b8612876be04fae3983490e0c1023c148e1c41. 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/DEL111200819.
The Golden Era of the German Dance Orchestra: Barnabas von Geczy mit seinem Orchester, Vol. 1 (1935-1940)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ba170658184b79321762fdcf27e40fd02651c594882b5b44a316e1eaeb04a. 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/DEL111300492.
Man müsste Klavier spielen können” – Die schönsten Melodien von Friedrich Schröder in Originalaufnahmen (1937-1943)
Immer nur … Du!: Man musste Klavier spielen konnen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8f7aa90f9099a780ed8a269571c5cef94ecac37f19cec0774821cbc4ccb0b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEL111300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253a25a606e84519680ff8f3e0e54701f2ea8450b7883ff41a37e74b50b76917. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEL111300100.
The Golden Age of Light Music: More Gems from the 1930s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2637fb98fb92168bc01153851da1358182023183db390707582a127104752153. 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/CH6631552501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1445ce0a86443c681df0504e10a2166db5b9fa057ec753a07118738037401b0e. 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/CH6631552517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e22758887cff173f9658204ff8563277074aef37db4e0d96b8f70c56a38df9d. 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/CH6631552520.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe & the World, Vol. 29
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 4
Die goldene Ära deutscher Tanzorchester: Barnabás von Géczy — Frühe Aufnahmen 1928-1932
Glamourwelt Berlin, Vol. 7 Auf in's Metropol - Let's go to the Metropol Theatre From the Weimarer Republik to the Second World War
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe & the World, Vol. 22
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 3