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 0x78f4901eb53a5de5510673858aa87767851fe45510f713fcc3a1bb11d66342e8. 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/5fb18444-b760-4647-ad09-65ec90efca07.json and https://artists.proofprofile.net/proofs/artist/5fb18444-b760-4647-ad09-65ec90efca07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Es gibt nur ein Berlin … Die Lieder von Willi Kollo in Originalaufnahmen (1927-1946)
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 0x57461019723e70b05a174c2d4fa93ac0a17c0421abd9ea9ae2a934f30f2db9f9. 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/DEL111301212.
Zwei in einer grossen Stadt: Zwei in einer grossen Stadt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1e24f2ea55f16304874f12da191da70af4180eeaf92eb784705d4616986514. 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/DEL111301216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71ffa90c53ac13bf7e101a758dfacc98a7a02347238d2bbcd9cfc3d8a98921d. 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/DEL111301218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbc5c40f4041608ba7f3ffc6c1166e36a6e2396e43a50a489b6931230ccadc2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEL111301196.
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 0xb08b5e84765dc4a2158bafaa49842263f6d5fc3b5aab9dc1a7fc8ee49e3b7f6b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEL111301198.
Wir tanzen um die Welt: Einmal wirst du wieder bei mir sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c4abc419091a39c52f57e2e6012a72f234b139d500a45b49d66b999eb5831b. 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/DEL111301215.
The Roaring Twenties (Die wilden Zwanziger), Vol. 3: Das macht Baby alles nur aus Liebe
Glamourwelt Berlin Vol. 5 (1926-1942) From the "Weimarer Republik" to the Second World War - The songs of old Berlin
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
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4984b7fc7fcf64d3884a75c2e50577e7e1b0e1e6f77b30bcda1144c5b27aea77. 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/DEN960902490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2941c7ef8e63ca563e3cb655056b3b3f5d721041a11c6d129649e32988f5bfe9. 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/DEN960902640.
Internationales Salonmusik Festival Interlaken 1994
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.
History of German film music, Vol. 5: We Dance Around the World (1938-1940)
Rene Kollo, Vol. 3: Lieblingsmelodien (1968-1984)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f74bacfa58d4ad1e270811a9ed0e148a01f3f44c58fc530149c55d52a791ab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USB8U1010274.
The Golden Era of the German Dance Orchestra: Adolf Steimel, Organum Tanzorchester und andere Formationen (1939-1943)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2391d4790b6273592600b21485b819b42ef3fb2f0d9fc73c3822e9ac771b1794. 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/DEL111300343.
Chor und Orchester Theater des Westens, Berlin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd271c38e6db100d58793e78178d9218470f281626cc37edbb5e1315909b21f81. 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/DEE377900200.
Wie einst im Mai [Musikalische Gesamtaufnahme]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab9457dbce62c4c125eb1eba739b5f824b1622a19400f1bfb150ad76058d0fd. 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/DEK130505501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71992c9e3be99385f785b769181c1375fe7416143c028ace62d109d3674eb5c. 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/DEK130505506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d341afdb70b7866cc1cfc313b4987727979dc112d806e406f411068beaac79b. 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/DEK130505511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37206592a6b2b2c963a352c10844b8e9589efe498cdf859ed4914e51561c9329. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEK130505514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397db45bcf892f77ddbae29cee2a6b241df0c8a6a1715ef5041992d5344f9989. 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/DEK130505518.
Auf den Spuren meiner Väter · René Kollo singt Kollo
Was eine Frau im Frühling träumt · aus der Operette 'Marietta'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b644807953a96166638574279566c3ce072ac3cb4a467b1923a68ecad951fa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEC629100785.
Frauen im Metropol: Komm doch in meine Arme (Remastered 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60eb42e102cc27eea6daf6fdd07dd8f947d256570a35ed20fee66ec467e4013. 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/DEL112201530.
Wenn der Vater mit dem Sohne... (Unsterbliche Evergreens von Walter und Willi Kollo)
Überhaupt, was gehn uns denn die Sorgen an
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa21f184ec2fa0a0837416378167091dacabdedabfe2a2beccd50b39e5fb9e9e. 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/DEE479300006.
Das war in Schöneberg im Monat Mai (a.d. Operette "Wie einst im Mai")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7702b7b06a75604da3ac19b1932ad4999f96a855fa719abebb19ccc6740b1d49. 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/DEE479200013.
Erfolge, Sammlerstücke & Raritäten - Historische Aufnahmen (Folge 4)
Kabarett der Weimarer Republik: Max Hansen – "War'n Sie schon mal in mich verliebt?" (Cabaret of the Weimar Republic) [Recorded 1927-1934]
Die Goldene Ära deutscher Tanzorchester: Das Eric Harden Tanzorchester (Recordings 1931-1937)
Die Goldene Ara Deutscher Vokalensembles (Recorded 1931-1941)
Icons of German Cinema: Frau Meiner Träume – Marika Rökk (Remastered 2017)
Historische Aufnahmen, Vol. 4 (Deutsche Klassiker 1940-1961)
The Richard Tauber Collection, Vol. 23: Popular German Songs, Vol. 2 (Recorded 1928-1933)