Marien may refer to: Domkirche St. Marien (English: St. Mary's Cathedral), the modern Roman Catholic cathedral in Sankt Georg, Hamburg, Germany Mariendom (Hamburg) (English: St. Mary's Cathedral), th
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 0x9a74cef5107cf506a501eda6174c658b29799697ed788e418f5dd64088842086. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1eef5aa-b228-48d6-8807-a22cee28db06.json and https://artists.proofprofile.net/proofs/artist/d1eef5aa-b228-48d6-8807-a22cee28db06.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 0xeb0b20f5f25a719bbe05c5dbf2a9827301ec05d56eda994eeda98639366cd563. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/CZI471200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eb43fdc975de36102fd659662a39eb343f0e0af45b5d7ebab91e560a59d970. 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/CZI471200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e08d865a8c4cd72d8b06ee7e3739b20953d7bc1cce9783730988eb48894c1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CZI471200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef83011f36c21e7441c9d2de1727f642708bef3e3547f1e52549a1e74daa1c21. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CZI471200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10065b9b029186327ea99e7b6d0ffe31f1a685c5d4ee49e8f098b4a48c96c5f5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZI471200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8fe50cebc430bab71cf5a2af8c4a6b3ed0fda0ef5189cdecad1360c23fb6fd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:21Z), 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/CZI471400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363cee80fbd7e109e67e9c546de242e901ee15e7f107dafe8394a350cf1fb928. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CZI471400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827d49fb2139904299b80fa3fa9e99a14cf6f5094b8b01ed9e3d8e2a761ca1db. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:06Z), 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/CZI471400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7d911361c6d180fd47a3b47774c9e6903b6745c75b4dd4e629bac95daad8a2. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CZI471500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495e0bdd8a2d67715485c07802807ecb07b9d9a8e364cef9e05ab0e9a421f490. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:32Z), 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/CZI471500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8070c89a5dbe5a8b670d2726f725348a3e7c58d65f67c39dd0c6a01d81bb209. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CZI471500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd66740bca48c6c1c4bf63e6306401df15bc903e1f72b02671997b6c336abad. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/CZI471500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4162eb971b257447415e5d1f34aab5e4d5b5acc502845d6129875878330981c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:24:14Z), 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/CZI471500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a4a35c87d60164cc7f555ae901d8dfa40625fbd12cb9690ba4e9761a71e4ce. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZI471700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c001be3f7b56af9126c8aeb2f47cb269717773947d38c3a5854c4f95f42ab2a. 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/CZI471700151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b8d7a1b431da01c2c6010a5dff16b9be7780fba9c44bc8438804ec9d5b422f. 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/CZI471700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3045a93935d909b7554949af7a4da8fcad463d1bc76ad18e833e3ecb6e9f7b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZI471700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255b401eb905b14728ae79e52899387383dcb42356044591a03bda15801b3871. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CZI471700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd148b0e43d004fdeddc94301e03148f6b5946eb4eddf6967c368109c52e91c24. 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/CZI471700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346f8c6b6add8683a5e8617a1c01d57f792ba7eb3abe387b9dbade35215f2c9. 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/CZI471700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529fdf9592a83ed7ab03ce9c3f1c0fddf13a8bafc1d522c0e8db10cba3f12779. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:45Z), 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/CZI471700161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d560d394a9c59294a4b94ee49adf60fe9aee9b35295146122253e151908655. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZAD81900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fcfefbde615833bf8860a77812179e1df22f947da25ff9eee2940c2cbc0721. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:53Z), 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/CZAD82000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4449bad4bc4dd96fdae77113ae458228f4b91bb3bef93aed24c11ea5b3612f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:19Z), 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/CZAD82000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed71593ca730067a212ac04dbd6e6398c814d92ab2ce745df543fa0056aff16. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/CZAD82000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6505aaa32b62669e01e628420e60124351252a2352708c1da7e2d749b1205514. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:39Z), 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/CZAD81900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4250586e1c0cc38a4c5db844ecff10c2a0f392267180917f89fd048e69f788. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:08:10Z), 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/CZAD82000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce52288a1e650e9d379f168ac071f634663dc42f54044fd868a8a39f3aac6ed. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CZAD82000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1baea9221f1735a7517fbeadaf51f71afe8f80098179c0ee0e71f35ace7354e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/CZAD82000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad22781b5ba878a1b4b92644ddd47ff4eb02f94d399295affa42d2b3483ea47. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZAD81900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437f2139e532165961f039a8842767aa0aaffe2922e506a55dd61b3274f71392. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/CZAD82000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d241d647a8210cefd237907d8c001590b95e722f944b8208a76498ca1da810a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CZAD82000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c2ef5b0bdbb8795d9b35a76617d42cdccea66dad9f4fe0980a8da0edf603e5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZAD82400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ad94b4b397f77306bfc45cf7789f66a89b4ea395323f50733958806bc65043. 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/CZAD82400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89b9b02cf80bdf96f531737ab04a4186b360a547bd05a72a796855fa33b046a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:51Z), 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/CZAD82400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90770cc66aedc0bff39e6ced4d05c2064caa7ae06a1bc2ccf6682211a423d888. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CZAD82400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08eba563100998c09081f227ede8ce2e3ca2977ce5af515f884133f9091d794. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CZAD82400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0129924215f5fe2b432bf67011f4cebcd2b4d663d850044fd8f1b12524f06c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CZAD82400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2354a2a2667555303c0989e9c969bfabefe6e22aef447c4e2d035923ffc29a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CZAD82400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b897ddfecb20aaad61a21bb27a2e20ee0b1f3be2c70b9c39b29092414b1184. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZAD82400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd272e181a046f0068faaaeb0e1ba876c13b1073723292c061215bf2cba06ebf6. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:30:02Z), 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/CZAD82400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc146399d32b2c53b52a13973cbbb8ccff8d0717a7d149a79c380e15df1c1fa. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:08Z), 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/CZAD82100152.