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 0xd4ecd04afcbac74783dbe6bbad5b35d7a058b085e3b0ac8f9a43f2e1e51598bd. 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/76270f18-6594-43e9-b2e2-83d52b8d9207.json and https://artists.proofprofile.net/proofs/artist/76270f18-6594-43e9-b2e2-83d52b8d9207.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 0x896bc16d70eac56d2c55a5895bea418701f3a2ab1253a601c235c7cd4fa87c2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUGBT2421359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f95c5358ff57bd6b22f45530a9833f1218aa72e6810b0960a846f701de732c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/AUMEV2345701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb5a59afd7e7eeb2e025351a8abc3facdaaf8b54b2a6364815c67a195993a9a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUMEV2212874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206e4914a773f898bb22f5c2fd86b6b96641bbc0d698f7589084c51440f5bd93. 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/AUMEV2331898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc543cbfc4256eb139f2f6b13f7ea770110004912d9c8fe68ec5769e1bfb01db0. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/AUMEV2437543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f3ffe5d55153d77430c8c1456afbc7476e47550035edfe29e4347c83a3d7cd. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/AUMEV2460986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a23183591fc065b2502d04dbcf02160ae5f8d55de13588f18dd439e8bb0926. 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/AUMEV2277252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aee4b7dc7081e15390f945eda74b3d1e593479d907d2e0ec0f914643cbcc18. 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/SE6A92125905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43437aafa73d187743e47adf8b482435b717a6ce6ef1dc25c50da1acf8d98e3. 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/QZDA42145475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0fc6a1197c2d583e0b43c873219f141669fb397c50074389324c9bd073e30f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYZ2062109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d27f4bc34573f31dea90cdf924519c566abd1c9b0e3fad728b48c96e743cfdd. 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/QZFZ22110869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0901d8fd453bdc81b6ea0477a9a43aa675ac487a1c86f6ae23ca610f1062f88c. 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/QZNWZ2073816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5fdcf944106f823305165241069ef1e75d7a745ed33378826086f69d6c4b0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA41986025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fc882f89fb49258010b82c2ece3e16f9a0ca8fd0906d826d2175d89ad665fc. 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/QZDA41986026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127d5cb69d7d0bd8a6b333b41545690988455813a3413fe0f7eed4e43f280e76. 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/QZDA41986027.
Ich steh' an deiner Krippen hier - Classical Guitar Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7f0ef887dfb82ca3e2aaabafd5de968c78d28ab78f355dc36b38703fe79aef. 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/QZHN61930866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20e741aacac0ff720348a27ad9b5667128fd8f988cc4acae3de7289d1eb747. 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/DEK931811051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf643b40639ca47df8ed6746bfcfcb467d4d1a600327ad72da383f93d167402c. 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/DEK931813041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f3ffe5d55153d77430c8c1456afbc7476e47550035edfe29e4347c83a3d7cd. 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/AUMEV2460986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc543cbfc4256eb139f2f6b13f7ea770110004912d9c8fe68ec5769e1bfb01db0. 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/AUMEV2437543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f81fc679243079558c81ea1d06f68a75433793a050b4d9d7ef89aa5a4717d8. 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/AUGBT2325598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1babc99e2b86f8fca3be5bf6230cb663fdd1a3384d0ee91dbdaada2304dcf402. 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/QZWFQ2341470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8a260f6f32634733a91aa71cc9fc233216a6c0ae79e4bd5ed996bfa838cb12. 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/AUMEV2377571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bc4c5f945177bad7b8084376014a19b24a2096c58558008de063bc58aa0288. 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/AUMEV2286632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7156b368a8c242d5556c5da62b0932a12473a9037a54b5647ca25fa3b1f1ca5e. 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/AUMEV2389869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8558f40c814ae59ad698a1a17e0743264efbfcecba9975ef0bb22955425112. 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/AUMEV2371894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f95c5358ff57bd6b22f45530a9833f1218aa72e6810b0960a846f701de732c. 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/AUMEV2345701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a23183591fc065b2502d04dbcf02160ae5f8d55de13588f18dd439e8bb0926. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/AUMEV2277252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4f4390b9e9b51a3889c38592e922a30f6846f429b5080393e9f8351a0bd9cb. 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/AUMEV2275228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7318df84cce80fa7cb2a115f057ef2e704afe4a212fbd0076b450808a639f7a5. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/AUMEV2249845.
El Noi de la Mare (Nylon Guitar Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb5a59afd7e7eeb2e025351a8abc3facdaaf8b54b2a6364815c67a195993a9a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2212874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273dfe488bbd84c81b55e5724f58ce312bce3b6a80463161a1d693676538822e. 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/AUMEV2209857.
In the Bleak Midwinter (Classical Guitar Duet Version)