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 0xf3e5125742f983cfa8ccf73da1473666a80a173d2b1df8b3976fd65c07c44996. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65d38442-d432-4657-9a55-82b1b9dbe24a.json and https://artists.proofprofile.net/proofs/artist/65d38442-d432-4657-9a55-82b1b9dbe24a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x5773bed63cc5b14f10314a61469dea37e9d54700939d5b7b1baa7c5d60fa5f60. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA431200991.
Teil I: 1939 - Hitler-Stalin-Pakt / Angriff auf Polen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000ab4a2a2eea504497e9e81e7dcfdba1b8066951a3b78d012456416c75d3b0b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:08:18Z), 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/DEA431200992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306cc4564b91a154cb05d0d20acadc817ab4f7e08ed4c33e23992f907069027f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:09Z), 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/DEA431200993.
Teil II: 1940 - Die Invasion Frankreichs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc150f64ced38467ea91a6c7ce928838e02090a592de772d8dfded0283730f52e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DEA431200994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b284d64a2849cf11819e651bde90aea9cd7bb24d0ecb19c340ffd23fac43eb0. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DEA431200995.
Mobilmachung Amerikas / Konflikt zwischen Japan und den USA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e029ba9963986b9a6e9bb62880fb0115a825e1d28348e92626f276a2bc01981. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:53Z), 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/DEA431200996.
Briten drängen italienische Truppen in Nordafrika zurück
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1048955fb839c934ffdc928484106b48ccf3513f4b068421d430027aa08a0152. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:21:46Z), 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/DEA431200997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1807cb5a13a8669a5aa065549aabb83688804c3ef5c77eb2a5b6419731a5622. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/DEA431200998.
Operation Barbarossa - Krieg gegen Russland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c871cf95915bdd69db9955dd6d34a13b0c7b06cc56b2b4f5f5876f2d509edc. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DEA431200999.
Angriff auf Pearl Habour / Kriegseintritt der USA
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd150fed39060f7c33eccbd05fe2f062e4e9d035e83bd9bdfb4d696da91ec0fd9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEA431201000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61c78fcac144771e17011eb009912404802b83b2c3e147e62842cbc1a756f63. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:02Z), 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/DEA431201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8cf08adbf4ec5ec07e9131fa47f78b4ce5de3986d490deab9ad24957675093. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:24Z), 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/DEA431201002.
Die Expansion Japans im Pazifik und in Südostasien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556bb553cb0dde7ebc79711d4b873ed269c744dc818e1b9d3d89ada2ee9e6ca3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA431201003.
Der Luftkrieg - Entwicklung neuer Flugzeugtypen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ab235b532654eb04d4c337376b88b3c1db25c1fdc5cb1d79ad6da444ebc886. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DEA431201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc489c59bd597c77a0bb4b93953dcce51432430dbf3681d3c1a3e11a07b45b97d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEA431201005.
Erste Kampfhandlungen der US Air Force gegen Japan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f0a8c2c58ff0bed5eb97e38caf57ee24c8b1c28ed19523ce520b2bb32f754f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEA431201006.
Teil IV: 1942 - Internierung japanisch stämmiger Amerikaner / Abberufung General McArthurs nach Australien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241db60bc0aa6ab789052748a9b094f23824c5aaa58de0913c159c58123a4f5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:13:48Z), 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/DEA431201007.
Propagandaschlachten / Der Kampf um Midway
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49d1556360ff889fdb68a1926b1e2764c25d5110e0195628d70770be8e98be2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEA431201008.
Die Schlacht um Tobruk und El Alamein / Erneute Offensive der Deutschen in Russland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27b5513c4c720d221512b8401f4281e2ca06afca55e1ff017c598ae3c81e687. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEA431201009.
Stellungskrieg in Nordafrika / U-Boot-Krieg im Atlantik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4833bc0c82a6bef847c30b074495ca9bc74da7da917d074a45eb75131905fe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEA431201010.
Operation Torch - Amerikaner landen in Nordafrika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf69ed0da0a6b08707292a955a3f4c7b7f955b8609522dba359cb08b838f9d81. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEA431201011.
Teil V: 1943 - Deutscher Rückzug in Nordafrika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc0b27c6684142a78a3536846b3897a726d179e5efa0189a769f79f4e51083. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEA431201012.
Alliierte treiben Deutsche und Italiener in Nordafrika in die Enge / Die Schlacht um Guadalcanal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e02ab3e0d6e260d551a796f894fa412ccf6eecd21b57aad814116982a02f502. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEA431201013.
Erste Luftangriffe der Alliierten gegen Deutschland / Die Wende im U-Boot-Krieg / Panzerschlacht bei Kursk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75999bb64a9ee183fc8abd3d068ec6f6561d88a93173c5827be875b78e213cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEA431201014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9845be0924c362ff1c0a5d31b9c793c9931aa32c5bb0527bac9973c1a7e7a8. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEA431201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc91a87092fb1ded09684fc05b182a416a217c3627d9d9b9ff8afc98ef8bcb0d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEA431201016.
Teil VI: 1944 - Einnahme Leningrads durch die Rote Armee / Vorbereitung der Operation Overlord / Die Schlachten um Monte Cassino und Anzio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52123cbc7cb79c1306712fcf4c34feb38c3e1e69a3bbbf54e0f18648be3f61e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEA431201017.
D-Day - Invasion der Alliierten in der Normandie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d9fd9d55348b14a9d08611ad31eb0e784e433c5063c6fdceed87f0bd139764. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEA431201018.
Vormarsch der Roten Armee in Polen / Die Alliierten erreichen die deutsche Westgrenze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507b9f81c0a7ee93c5b696dd033d40c996904975d6f44cc9abdad315045ad843. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEA431201019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ba7d47b087ccf3fc7e05b4743f88d1b9aa8858278d64b4dcb14bd23a0e4b27. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEA431201020.
Teil VII: 1945 - Die Konferenz von Jalta / Ruhroffensive der Alliierten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a1fc6db4382630d1141f427a2ef77b5bb23be245bcff65a32d1ee1e1964231. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEA431201021.
Die Rote Armee nimmt Danzig und Südosteuropa ein / Deutsche auf der Flucht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902b5e1ba8c13a12cde012e79c5206cc75d57e26e09625e770f7f8fbe64a766. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEA431201022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf012c20b03d20c3e3d034b57ac0d8dc09b38eb23bcd325c7fbdb7d00d6d93595. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEA431201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b27597a44f32f82d40e3ef66bcb584d1d445b11382516ad90eecabf7556bf04. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEA431201024.
Vorbereitung der Rhein-Überquerung bei Koblenz / Befreiung der Philippinen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fe38ff227d68d3e7f436ee4f1895a6336caf4803ee923617a3e2d69f222d82. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEA431201025.
Das Ende des Krieges: Die Schlacht um Berlin / Atombomben auf Hiroshima und Nagasaki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3477fba7171acfb76161601a8447b569c2be34fb46d86e47c79bcb0ed885172. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:46:50Z), 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/DEA431201026.