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 0xabc17473f61daedf347a741130e44fea1f925731a86beca56ef264c685acae9c. 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/b98ef05e-1481-49d9-9b1a-a870a51295d2.json and https://artists.proofprofile.net/proofs/artist/b98ef05e-1481-49d9-9b1a-a870a51295d2.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 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 0x65364abe03b598e9868b3f89ae21f83537744b536a3355372d62a0a46716cdff. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USA2P2256567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113dca2787477c3db5e6a023467a772839f0634c1569d89bf75179600415e722. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA2P2256593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7416b366216aff5a05c3bccdb79bd9ee1f44755b5897c7b665f36a1d51b9c1f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USA2P2256563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45b73a7521b027729dda9b480b061e54795caca140c47d8fa04bdeabbca6926. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/USA2P2256561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42745b2296be99c9942d38ebea300497b47fa962a71e0c925fa55b1bc3889cf. 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/USA2P2256558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7f65cb9b7bda3eb577043cff43d8181c645fe61ca15439c3bd99ea6e5945c2. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/USA2P2256559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c80b43241bad05b405cf5200c849556d8293bd5408786e9918c2b703aa47f90. 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/USA2P2256579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba0459eee6421f3dbb6254aa760969c7a82e1af7de03c26659a1734bf012a0. 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/USA2P2256560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfd2c7436a1dd31501e519a710856dff2cec57053eda5367496cd12315235ae. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P2256569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa01ae0697a056ee1b03c24c4a0741e5a6ac841ca4fdd4b18dfeaa90910599a4. 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/USA2P2256580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf472b5307f4bebdf6f256804a5eaefbb460e3dee57dc96b2a5f481452ca62790. 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/USA2P2256578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d128ca274dc8e0f503e090c7c88529f0f0d59694c97ba3f962ecd5ad5cd8af. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USA2P2256572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8511b36112b98566d6e11929f2716640ad8ab82860dc871a74acfc9fcffa4625. 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/USA2P2256581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68693bdb5dc3a7b0e9bbd9812c0b2217f5e73b9b5b2bb89a69b4096da1647b7. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USA2P2256562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5a08f79e5a7f044e0f0b6ea3a4567c17c8a8ed24da9d376aa857097c57c441. 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/USA2P2256583.
St. John's Eve (adaptation of "Karitas" by Hildegard von Bingen (1098-1179))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9712d5b90e055820051a2cfbb6250fb3cc929d42046ebb2f3bc6c1bfa75d32e. 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/USA2P2256592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404b8369dc7532477acbda47adc38c83c6651c1487b7eee647624b4432d49b65. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USA2P2256557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e15c2437aa0233702cb478bd9654d616c1dd7da72d55cd361388eaedc11d77. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/USA2P2256571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb72a12df4394a60ffa33fd63b51eee6142d31426f9e18db3b809f02f544e06. 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/USA2P2256590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb750f37e72694cd180136b64c172f5ba50729dbde1133b1e7206fcf4a5953c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USA2P2256576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5347dad6aaa9827734aad5a28b4f10044ea5f64e32b2ec7e3f352c588a5e37. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P2256564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d5a8339a956cec5f006ee9e2d86f164693efa56850453f661a982be31823d. 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/USA2P2256568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a7613807498c49b87a64c9a832800110c42ed7d4c50ffc5849efa06cae5213. 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/USA2P2256589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1f68a8f38662cf75a5462696c184c499a5810203b5fc8cf5234560dab6811f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USA2P2256570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf415553aa7764db1cbf60bd341357aceb9c933faa56dc421b0269647cb38bd98. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/USA2P2256566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc0b090beb1c581ced71973f0526bd67d788e025fbba67674b0caf0a2bceca8. 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/USA2P2256587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44bb9bc011727308242c196ef66fd7c5368b564d6d9d21552356995641682e8. 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/USA2P2256574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74524f561b4ae8841df025f38fff5db595307f2b63ffb90da6c819efc764ea. 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/USA2P2256577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b6c7b82ce7c46211453b180bfcb8a46f95d32d863097623e0ed6b398845bee. 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/USA2P2256565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e39047e4d3e951d3d5694faff16ed281e41c46de393e610c065e09c45151b. 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/USA2P2256585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fcd140cac2ab0b80006da68349a8c86006d648bd178ad3ec5aeb6a6712ad3b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USA2P2256582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2d9cebeee92c33fb0bfef02e3277555e9358a324012a45e91633143ff52363. 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/USA2P2256584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc716128e606f4ce7a327f3398b0ea298dd787058f4f325f623205a8dc96e42. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USA2P2256586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f21e2d8bb56936a1b31a2226283d2927f4ac3639ba295adf93788d95c34745. 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/USA2P2256591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5c470a0e98b983579730757b91a3838a3f68a13a5e6721a746dcd43dee9f13. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/USA2P2256573.