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 0x0c27fdc67e0d1244985a3ea2b24c0ba7817a1c7a7f7ec23145d378dbda45febf. 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/bbf18144-55fa-4896-b2a7-44a11ec3ce3b.json and https://artists.proofprofile.net/proofs/artist/bbf18144-55fa-4896-b2a7-44a11ec3ce3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Military marches from Austria and Germany
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 0xcb9d71b596720f0b04d47b7270935392f37d7e8a7b93ef6315f9fafb4405a13c. 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/ATK220100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b12c08e04e5eb342de7e4cb1c7a938e294c823010889848db22aa09a34684b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUM70601347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665ccd596d5122bf0a53bb9db42d8b55239c47e729d3b955b503f93980412aa0. 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/DEK272130107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa819859d3f8fe0f5fe3b4a4a6810e3c3d1e31df370ca85996e97db7fd6a455e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU240806652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa1761184cee22a80fc047f0dc4cda2fc7bdec203e95f9bedd2553db09e825. 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/DEU240806653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0505d3d3975042c755ce4df0695c30bcf6f3ecec8d380a35df7359987cfbc6a4. 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/DEU240806657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af17d5d68f44d74ad99354e34cec494a740c6891fd89556cd44b60497e0fee1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU240806658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac17e74206f56b556de01ba80533e3bcefd3a7342ba0963b0c8cb9fbb72ee864. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU240806660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74163eaf296218c51acb9f1a40a26e04a46ea9919c08357992343d12bfed97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEU240806662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440d27d2f9c2820bfd76f1f3e8fcdc8304893913a25d2a93d5ca71da7b8a5f03. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:09:09Z), 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/DED810104820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96222635e73a1ecc3f9e54143dc69e976e5bedba6bd2084decd411acb8d5e45. 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/DED810104860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1717d7447626a906929f2e8fb11919dca5c92b7fd940fc3db25270516836824. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN120501647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d96a6faed24e50718c7e112b05941f1bfeec92dab284b9f247aa066a7a22377. 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/DEN120501648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f23969864be7c3706747d83b02e477bbf0c2730efd8533a4d8086f82192042. 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/DEN120501650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99130029b47e511fc2d539d4d75475b2ba12f8c77e99bef56846bc6d4d69480. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN120501652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeabb729f9a6ab5b9650337dcb8e112e5f6c77e86b707556c64cc5fad819d57a. 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/DEN120501659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8579fa371296ac5c2de65776cb30387c9fde031e9294a67acfd7103437e440. 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/DEN120501660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840db64098864dacd62cc46a82d82b8e6ced0903c726dd64dcea81706e0247e0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:42Z), 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/DEU241079979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0c85bcf76de4ae14fd987d1a13a4bd56ef456050a3c91ccfd250f6679c0cd8. 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/DEU241079982.
Chor des Kameradschaftsbundes Frankfurt/M und großes Blasorchester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bcaf2ef4c713e0a3dc5e1c20161a11979092f1439c91f6ec7d89fc793ba397. 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/DEU241079983.
Auf Der Heide Blüht Ein Kleines Blümelein (Erika)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a1b7d4621700dc2bbb98a2dccad53dc8465d7ac1f143918d4ec9f6cb1ae55c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEU241079989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54af57284656b5d173469273120358670375257f8e58e6e70441e4057b690dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA549712020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3bb663c2d66bd74d4b97a246431cbf18bd7d131a6ba702f3a2cf49d12fd55. 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/DEH980672720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b2e4a4109734cb0661b5da10237bf0ee56a0ac308a16a52ef100687ac97336. 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/DEH980672760.
Marsch des Yorck'schen Korps (Yorckscher Marsch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe67f366592a23f965288b14ceb124327c2116cb4c66e37e88fb06aea39f2a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEH980672780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5b3edce81a4e086687a7ffa9ce4da5f290e0fd7ac2ee502529e52d1bdf3b34. 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/DEH980672810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80475e5e05a2cd3d3e2821d9e2c50ac0e9de7315adc233a9840f90cac4766bd. 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/DEH980672820.
Hubert Wolf und seine Original Böhmerländer Musikanten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1d64749d95f0145919a7dc5268fa655f7cd2b8986693eaebe4b9cbb412bad3. 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/DEH980672840.
Die grandiosen deutschen Märsche - Deutsche Militärkapellen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d2d08247a5cba9f94999781a63ce539bb0fdb9010e74b3e6e3f2461735bc1e. 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/ATT251902580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a88842dc7c4614d9f28e03ca2ad9970733342cafe48e15e00da865dd5192939. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/ATT251902610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa438cc7cd4eca22c678e44f62e9d85c53d05d3d3c3fffcd8d8137c247fd910. 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/ATT251902690.
Das Goldene Marsch Album - Happy Marching