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 0x1c1c64ae74cfd4d673abc94b76f54faf270103c67afde1480b9618eade95c25b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6041f667-1d3b-4e79-b5eb-87b302014a47.json and https://artists.proofprofile.net/proofs/artist/6041f667-1d3b-4e79-b5eb-87b302014a47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Swing-Sinfonie: Willi Stech und das Tanzorchester des Deutschlandsenders, Das Deutsche Tanz- und Unterhaltungsorchester (Recordings 1942/43)
Der Abenteurer von Paris: Ich und du verliebt
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 0x5d3716ce2cdaf8ba73e32677f63f5f1f21c798823ba3dec045a6a6370a5d8944. 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/DEL111200665.
The Roaring Twenties (Die wilden Zwanziger), Vol. 2: Am schönsten sind die Mädchen, wenn sie baden geh'n (Recorded 1926-1937)
Die Goldene Ära deutscher Tanzorchester: Robert Gaden, Der Gentleman Geiger (Recordings 1929-1940)
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 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/DEL111300492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36b2be36753fdae53d6cb0a3d0bda6cbf1687f7cd30f083e387e025a6efe962. 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/BEC990751401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d17e1760efb02a3c5a4036f03f469b6c8be37356fc4c0145b8b202f51905c6. 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/BEC990751403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583c2d19d86d578741af04d45b8e6f11431ccea53db0af3ec81c7e97bed9409e. 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/BEC990751406.
Sérénade Indo-Chinoise (Characteristic Piece)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b821f0106d1df01bac242eba7c606cf953fc3e1a4ee95e813b8d270a16789a1. 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/BEC990751408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fe616eb1ab606f5f135fc65182e20c4da948c1bdd2358de8d1b77ed0f18beb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA560966299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50a6312294775abf247d1f447e7bf4027744a341d31b7af293aca3b8ae4e199. 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/USA560966301.
The Golden Era of the German Dance Orchestra: Joe Bund und sein Orchester vom Hotel Adlon (1935-1940)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cdd1582923822a2f73c7f2a461990c8f696d4dccc997ae33254ab9a4c6c6c4. 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/DEL110101087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dd56750ce636a38ab4d66edcda7a0afbb369938f7f098b8f93307cf0e62705. 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/DEL110101100.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 3
Immortal Voices of German Radio: Greta Keller – Accompanied by Peter Kreuder and his Orchestra (Recordings 1935-1938)
Music Featured in "The Kids Are Alright" Season 1
Radio Klassiker: Im Nordexpress – Die Eisenbahn, der Jazz und mehr (Hits from the Railroad)
Bei zartlicher Musik … Die schonsten Melodien von Gerhard Mohr im Originalsound der 30er Jahre
The Golden Era of the German Dance Orchestra: Juan Llossas und sein internationales deutsch-spanisches Tango-Orchester (1929-1940)
Internationales Deutsch-Spanisches Tangoorchester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611dd13d4bfd07a091985c6534ae97bb392268909ecd111f5c88d63e696d24e8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEL111300730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf39b8e5d1b0905636ef2e8cdaecdf9cc098f2ce232a52f49746686c4382bea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEL111200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7f373c2b7e61e1d292db5b47df2f9b92f9137ff5f06a456a029308b8af2582. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEL111200772.
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 0xf43d7144707db5843f9c32638067ac3a0be30119db668532fc8533fc54dda4c3. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEL111200778.