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 0xac6da31752687a236dc47b3b481ee90c9fc5296c355228240b39f2956f3aab92. 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/449e70d7-5db0-41e9-9491-a624f1ae048e.json and https://artists.proofprofile.net/proofs/artist/449e70d7-5db0-41e9-9491-a624f1ae048e.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 0x9581729af050961bef840649c92e56b11b317faabbce95f2972ff3f930999af6. 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/TCAIR2411476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f3eb989667200c8b600798fd6a7888e99abd97fd2696002666095e2c4212cb. 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/QZWFK2384569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab5efeba22d979f0c0d422cecf762e6eed06bbdfba8850395389da992a348a5. 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/QZTAW2313950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01af579d4e7812be9160ce1ba6d20ef86442704dc3bc754dffe2c98f20b3dd5e. 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/QZTAU2300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0a0894cd65a76a553a19fc6f40426c44b29a1c60f9333e017dd4322a76606c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWU2380716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade40e6ad88ebeea890070d85578ed891ba217190cdbd3aeb3e693073b6e07dc. 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/QZFYY2322763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7e884b1cff25918e5cfc2951cee72d84fb6ae5799f68098cc3f84b5451cbe8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWS2259606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be970f6c201bff9a0d0a7ad1b3517e2504828c01776a015087b12b45130240d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6J2266841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5fcf5970cd4fee72a9f1c39e585b6e37126dab84857bd59e4b4e35575f1de0. 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/QZHNC2297740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae575f5c77ccb9b7dc5b88141b9be186b4bc455f1bfc68af41dd0fe508b50343. 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/QZFZ42253851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7296e1aa7e16a74fbc05ab037e5787bd3fef3ebdedd98a3084f941d9430d027. 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/GBKQU2162854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc517d0829a2ef25c7d41aafab1cc3df90f5452e85d650545202d3ebedb215325. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFQ2183444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c50967731d565ede2adab6d36a6c40ed598f22e503c652e3e7ad09a5e0a4f. 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/TCAFQ2183489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de7396e18bdbdd1229c7a4b92d8c4013d851c44df4813797262d1a00ce6fa70. 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/TCAFQ2183447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ddb6fa0c226bac360fb70999d82b5ad3f932ff875d9bb3ebf53e2963c234c5. 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/TCAFQ2183471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f1cd2189afc457b360a094fdf37ef3244080bf6ca7740575680433d6164f0f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFQ2183466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f9e4526da0bcd8855aac7806befbf82f84b7e6b035bc903f64a6308e88491. 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/TCAFQ2183493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06911250b019a5bda491ed1919e4afc1661693a88a4cb8f6e49ac0997fdf8013. 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/TCAFQ2183495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac988228ec4fa3e1868e032134bca06b1daf066094777979f96656c9398dfa. 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/TCAFQ2183498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83df85462c802bbd2bb763eb969bde850d9db7c40c0262d16e19a412b10d65db. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAFQ2183463.
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 0x1f388192aa4c2ba77c0afdf395361269f8ee0b6a04b79062eb06298e9235d620. 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/TCAFQ2183478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574a1b6baa33705d43d496c9479fa805bc4d9e1344e106a79cf5b37994704764. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/TCAFQ2183481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b6602e9b3798c6cfb5e0768387af9443f364f0900cb63ba2c5d07078dd7f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFH2328493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b583673f23f11e15717129485e6086f73f6f991c4b9abf312e5499830791839. 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/QZWFH2328494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb76d2b1dd9cacbe8cdb0ba30a22416178c60ae5f269a176ab753937b9a346f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFH2328496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c77ee2eafa0fb20beb4f2f4cb9b3f50648e9c04eb3fe3b3df26978d60905333. 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/QZWFH2328500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c24b4d1e368a55d1875b4c1c1207104f82b49938062a46fdd70891a4454324. 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/QZWFH2328501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d1d3b32d4df529690fd89196b38c837e52e9ca4f32660457711311466dc7b8. 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/QZWFH2328503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6840f0e7af59216e4699d90c151e96149c4149c54b66003dc1bd12e8c2a177c. 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/QZWFH2328504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6175f730017fe0f755c1fec26c44793759d154c29b4c61e938bea5629c928a74. 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/QZWFH2328505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9b4026ab8cd65cdc4d2b47441fb9711dccb382dd26df8b7b007a60fbf7a222. 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/QZWFH2328509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbf903dd1ad6ad6bf72e16883ae880f6e8ac9645fec7a6a1bfd328292110b92. 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/QZWFH2328512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c502d149478de08f6cba5add3c0be517205628bd9dbbddcfba699b1f743d71c. 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/QZWFH2328513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6528ef7efb89f55081061ca6306be1af80965d5a469c9808fb201930cb59f89. 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/QZWFH2328514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45601c1d82fa22c1f55fa35be512426a4b79a883b6d47de52cd0f7a059500e9b. 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/QZWFH2328515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49151f9276f3fd905863baa354da285431f9b2c9d23ecf8e03d19d3baf1cd614. 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/QZWFH2328517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5800748bb21879a6f3c4c2db1246af2e033a67d13c18e150fa80149efd9e2. 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/QZWFH2328518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610570cfc65e14964e78f0509912dabde2758249eef95935e256d6050983bdf1. 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/QZWFH2328520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5fcf0ae2708d80fa1ac8fd658f9ee874f987ea70b046fbb6d64c31bad76d0. 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/QZFZ42402745.