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 0x811cfd271439629e24ce61bb9e448a243b64397ea1634bc04c4529cca10e9544. 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/cc8a0972-5f9b-4de2-955c-2f1306dc15b9.json and https://artists.proofprofile.net/proofs/artist/cc8a0972-5f9b-4de2-955c-2f1306dc15b9.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 0xd3b40a5510f314afcd2e26cd1e214970e25eae89361dbcf9f076fefa1f3a7ee4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CZA751046201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f0b985a3da80cee975d8d1ee67a30d224e6b9636479b1f57d7c4e10a325e8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:54Z), 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/CZA751046207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff986183989467a3cbb4f663c4f45d132a04cffe5b9b1e1eaeae2ed0a20dd88. 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/CZA751046213.
Skupina dobře vypadajících mužů / Group of Good-looking Men
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10598d644fa5f2f2879b2ce2014bf5b73bd3b166e25fdc40b3927988fff6fcd2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CZA751047302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564440a4ed8446efe43e7262238f702116703a28f11f6286b6377ce714a55c0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA751047303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b74db7d21ab8fa13a3b3c3b2fa1ecee1539f290288aa09ca2dff93ecd4f11ee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CZA751047308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83aba386be1815c1c38a3824d88cc465fc995113614c31b49611cdd4c43e37b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA751250501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e27209a921f55f1716d48a2d96a80c7a02331c33271a68916f6d59d427dca. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CZA751250507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c494eccd33f12eb3dfd8237c5f484126c1b6ba567d6cee8b68575da8fd45bd. 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/CZA751250510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e1f081d0c5253ef196f3993a3abefe6141836d8da0cdb6ad507246d923c935. 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/CZA751250513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0882e0fb093f5abb63b5ea7354a9f7d668bbe7e3c7bb2dbf9a38cc750e509d2. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:49:49Z), 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/CZA751250514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ed9bda884e4b4e3dd825a4eb0effba4a8b595c497fb45de4ff5ce887fab04b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CZA161401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae34b2d3d034e1130c986291c913bffc1eb9ee394027a6c692e263445a96374f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/CZA161401292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870e5bff7b281c78f4925e0a7a64a6bc572226770e6f52d921a43e3ac450191f. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/CZA161401294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3c42b04eae340d2d442e6e831c59abb171056ce3694d91086bc8aa3fc4589b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:53:11Z), 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/CZA161401296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c84ad0d9bda232b11a4d8b1223de235a0ed39aac07dceac6f31b15938e86562. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:31Z), 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/CZA161800471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fdc73ed3728fb38836ed64b6feddb4ae8b923806c22f27a139332070484442. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CZA161800474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959c16856625535a6c4d6a7ea6a8017ad29e2482e59e48ab412a82d4cfbc6294. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CZA161800475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f66cd980a79b8d562e41279652531ffcc90cf0154da55fbc4574a06801dcbf6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:36Z), 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/CZA161800477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a3bb1034d70fa052d6e701fc8b221e66be5480bc39bbdeb3610cb93dd595f. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/CZA161800478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c000ace8f6bc89f8bc9afe43102a8973dc18eb11d17bac20c395a62f7602557. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:28:48Z), 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/CZA161800480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfa66a2788d458774069bcfce2486016d4c18c3b361519cc92651d8e80a3b4d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA161800483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01177deead07a5a24c5ad42346c41878a80c8811c04c0655008735916c06d453. 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/CZA162300367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8fc3d6f046a79578d8bf244f2a26c0be53e965841164e5cb1f1243efff0997. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:05Z), 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/CZA162300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97e5c61ec3968205a542ced751c5be1d28575377555da938c06a33c39193f05. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:35:55Z), 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/CZA162300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c87b2a12103e15eb021c6c9b66127776b901f10f4cec6560cc653d472c35ed. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/CZA162300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14936e5fdf47695e7b8d5b348e42e5043e2714af698bda6390f32a33a0bdb2a. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/CZA162300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b418984b79b3c1e8cddfe1369984a0175588e6e42a099a0cb879f6f033b9700. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA162300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3382ca42150e0af207abb4b3fc1fb15158477823e504220c2834bbed5fe2bc98. 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/CZA162300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b13f735e7e49272d531656336ef17f295a6ab8c07ea59d35ab10bb85a84b182. 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/CZA162300378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15464abb920c462b851b66b0ebb72ab5d2211649031c8b467b1358431739bee2. 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/CZA162300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef96767ffe52ac6a12025e6cb3bf6e2103fe9b2abdfd9ddcf0697c7d16a2e2b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CZA162300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da7d174d5588b7430e4a206329817fbf7ccfafc70d5a7f7acb2f66db41d548. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:10Z), 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/CZA162300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fdc856f6f7568e553314e85c54914995e81df3e7c200a7b0d0411a8f140e0d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZA162400773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65423c8e4b9924f7b391fb29fd16fd7f03c99f107caf7cbb6062b02371a178f6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:04:33Z), 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/CZA162400814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2e2616b83d1c1c3537a429cff4ec06da61902ffe338c1e6a403acdfc963b6c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CZA162400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542b286b83404d0619bda0202234fe98211c928790d4229027e54946bec14c8c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/CZA162400818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88f4b0345767f8812fc532174f17b767f5c47ddd8a4790163d4de6a1fbc4ce6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CZA162400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e8b53a51c12843fc57259174ddf1db1d9ebe92fa3da74c6265aca38af965c7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:57Z), 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/CZA162400821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3f2265a430f4d0a8f558daf4877efd1205f521546af72c4c7d61709c31fdb. 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/CZA162400822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7370a0e3aefb1d5097138a4af4c81bc31e06271ac16f092dfe98090d675cbdb0. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CZA162400334.