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 0x6fe84401e4287660adba27d89899459f23f6f8e5009e5e769ebdfcd96578ae7b. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f13709d9-c40c-47e6-87ea-0d16c31f8bcd.json and https://artists.proofprofile.net/proofs/artist/f13709d9-c40c-47e6-87ea-0d16c31f8bcd.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 0x2cbc1666038f3a77319d8076e568f19c5d19e5719ce50a696cb2b681dd6802b8. 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/UKCVA1700920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ec1df0b6eb3e5e98b4cd4b413d2b6a21d8cb3fbb824e8c7a37e0f8efeeff3. 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/UKCVA1700925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b09880fa0396903fe53a0e9cbcdca5a84472866f29691985cebe1e2ba4c5e3b. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/UKCVA1700919.
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 0x960a3be4a1fa640d9812a14a17a92119347827ecdd51b09aa4a3df5fb56d8f92. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKCVA1700923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7781253b33e1cc11c4aa62905f0c6d814a798bb478a5315b17b33e335cdf64. 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/USI4R0914518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3b56228cfc869e1fe50f5484c298f2d5e7bb2d711238c1d6597f0b1067f2d. 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/USI4R0914519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bafe8bf0eecd5a9369e58c8364ca44dbe2a4a773abdd0e1a6bde872cb300920. 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/USI4R0914520.
Schneesturm / Einbruch Der Weissen Dunkelheit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ab183dd6d70b195954817872633f99745d8b42894f3156daa8b2875c007541. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USI4R0914517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7c9c2032993116582182852f25089c977347b861c6373e67aaf9facb94281. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USI4R0914521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7ee17d6c2cd3f85e10843f4c0b1e622d1b3478eca582f84726018d198e008d. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USI4R0914522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4030a466d0476fd8f5f9b7bb2280c63e61d6eda37ca71502c02eabab02a03fb. 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/USI4R0914523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd360c3010045a4c606f29de8fa02b64c2404ee84331823e3741e5196be56e85e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:00Z), 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/USI4R0914524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2543957407652608b7c2f2d3dd82fe79d76d1f18d47b49236682108bb63f9892. 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/USI4R0914525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaaa8bed9b2013a6ae436b0b283a1d05b52ce900f93902704d59fda4997d548. 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/USI4R0914527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd6bd41ebe3517410eb05d81c4cda7482e0765508f98d86979e7f8c0824be5. 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/USI4R0914528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a2d1a70eedb51edf9c4efa4d0fa16b199dde5d9bdee237d4719d603e28b346. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USI4R0914526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f08e0e5c7cf4c90f384ec9ed3b503b440ac28e2456f09f85253980d21c6141. 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/QM4TW2390345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1a67892dfdaa28463771f198d00a45ce7cedf76c673ee30bc8df6457c2f130. 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/QM4TW2390346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6a2c9b26ae5bd770e9122033a53520c3f666d4b5803dc4c38f2851e8f2822. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QM4TW2390342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3b351a1017969682f76effabeeeef1c7fcbe78a00d673c281ca1c07a01221b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TW2390343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddab4673fd080f393c5a6cc670f274364f484d52cb058338887bb68cf2601b1c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4TW2390344.
Kälte, Schnee und Eis - Rekapitulation der Winterszeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ef6fa5bdaecf20938831d946f815bab749313da42d0f342061cdadc911e41c. 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/QM4TW2390360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690b9399a3e9a88a438918fae1edfaa1515e741e73fc23ea32f4e2e20253c50a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QM4TW2390361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599c520cdd3503092134e129128a5fe26bfccaa6cbe65784fff927f2dc57e4f0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW2390362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa513f93f887c0de0ff78876ece947228873035a1ce2035debbd1e883fe9a57b7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM4TW2390363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c31fab0459693db84c9cd4f47e6aa636488a30084453213b46d6d8bc3217cbf. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QM4TW2390364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6614879a7f705444919422583b8d4edfe85791e4631862e77db700efdc3ab. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TW2390365.
Der Letzte Winter - Der Ewigkeit Entgegen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34c0bbf8868fb758205ebd06930231c49335b63904638ee0326e9787ccd9eb9. 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/QM4TW2390235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7714bb4dc8836371961554b29b5859986c9df731ca0057b57a502e0e061f127f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM4TW2390236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecba743f181fdbe3564d79e4c5d892185fa95291335f495fa6208ba0d43945df. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM4TW2390237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfb510d73e7dc39ecce286aa7281febd440cce3811f623d3d566d07913413c1. 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/QM4TW2390311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9431d5f47a7f0e199192deb0cfd5b92431e2f3abf3fc3abbdfa97a8a47e9f1d. 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/QM4TW2390312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73031472f1bfc9ac1278bc7bea97f57387bb4e2365daa9b7b71d712de7d6db9. 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/QM4TW2390313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a0bb582a49e1b1e82182451601896e6ab8a2145657e4da32e7da5af371ee18. 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/QM4TW2390315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5b8e84e1fb6594c0a90d191206dd1d65733039f38c66b1e4022c715bbf7c9a. 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/QM4TW2390317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da96638a12b1bbc4560dec9d9198b9e32a1b9c758b8b748b534ec7c6a80b780. 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/QM4TW2390318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad92cb35a9d3f5e1798565c31efe5f4f63748ecf736d1820cbc45c3967e9e6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TW2390314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c517432f552229e30c86789cf8a024ece73771536f9a6db26c3f97072cdf27. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TW2390316.
Zeit-Los : Laut-Los (Kontemplative Antagonismen des Augenblicks)