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 0x563327b5a044582fb3d93192f97bd1f21d25bba4ec28d8b2640c7ca7e27ec50f. 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/a1a73062-80c9-4390-8f59-5cd6fdd05a17.json and https://artists.proofprofile.net/proofs/artist/a1a73062-80c9-4390-8f59-5cd6fdd05a17.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 0xb506444047b79b29f4f247f5f67266f7c4f3c02cfadbd619da286f4aea36cda6. 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/QZNWW2054224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101dcc72f212cc832afbc47bb141c01857ec46c54747f2f29a695026cbe32688. 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/QZTAX2214932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd89fc0d493b634386bbeab523c64369dd935ae1f6ad025e40c455709dc619f. 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/QZTB22269119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774e9aeebae890b04b330583dffd539f0d090d5c542b66f57f3d3549c3b018be. 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/QZHN92424669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8028aa7ead039ea24b6917144b3d5c3fa0a09f5d7ebb4c7c3e37f17a5a96d178. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZWFF2333368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4ac4143687f08070b64417b109f062c79f16ac3f80326bed09e8198f726e6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN52280293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc35ed6772fad4e85bc402c5774c8af73a34e15e33d50143eafce4354149e63. 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/QZNWW2130094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f86a8de3f04e32a830faf573412a4bfa83538a8ee2879b2f80b0e47c4e74266. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZMEN2196151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8da3e8551c18115821a8be11c044ec8aea8d752ac86f39ab556538ae6d05d6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6K2113092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32817c2c203ea6ad79a0bf61761960375647f7485e4165b406c4fd9c8a18d059. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZK6P2196977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ac08cf9ce206b88484ee9a1e9f77c6baadcd3388e591f4e64f0874c3256af. 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/QZFZ62151654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30000f9645bd144fd6106a33e9574d3e097fc91cfe89b8d212fd88de3238ba7a. 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/TCAFH2042755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee873023b31387c077a906657e92cc0bdee1dce34946e36f343ef25f1b7f004a. 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/TCAFC2024059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa9055e42492bd0d16978e9b2a85e1e39e66cd3094b40ec35752d955214acd3. 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/QZK6Q2073450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7219fa85ceec20cbe45fbe5b69cf66c9e919626075545a8df1fcaffcd8c5b56. 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/QZK6P2032580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04428eafcfcc1fe82df0341f9e22942b05a796b72f4d3aa84f82cd85b3e8d84. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFZ72036986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d36da8ab6852c34f368fdd3870ca14fdf81e92633286daa5e893f101c2c2a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFZ42096893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd5e96e60ecbb762e39294cc989757cc28e32efc36c332a4406d108c82d70f6. 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/QZK6N2087313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5957bca386be88831e01f7280a3c9c7ff6dff30b9ad382f77d74c903794e0f. 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/QZMER2073475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa390aa97b556984e79c10816db0b960e8b46a2c3db46b15cfaf8dbcbbce6f5ed. 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/QM6MZ2134026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817f2dffbf4428321335db83af5e5cd6f03f38762931305b71d509696f176b6f. 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/QMFME2141523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0e0d3153c2d7666750b8da8964f171a0b6e235a1e8971b04fb256c8f3d78f1. 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/QM6MZ2180374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bea0b969205499437f09c100f0a83f0928bf051c2bad0196c20826d18987e73. 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/QM4TX2277107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3caec8342c674469a0fee45129675bb2a9ed3988ffc8f04d9b79b38973e9800. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM6N22290441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0fd3bf243644dcb7acadf17ff7b315c1bb6d8124200aad9c685f7d2817dc33. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6MZ2218661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf8e0ff56e79f33332ec3561702b993c64b92d5aeedba41b85ad9ed35807fa8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMDA62160679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ed5a89b8d8217ee870a7a5c587c48d034d313086309a58906c3bddcb6815f. 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/QM4TX2108301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc8a7a8cadb58624d1dd678a5652c56e6b79ae669f2faa500038aee7760caf4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMFMF2113169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2f6217f522af624bcfcfbfbec5f7442041587c5e366cc30fd5808378ee829. 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/QZMEP2053448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc4896ada1f78d4708bf8b17c374db454c5dc3a36670ea64fe81a075975ebbd. 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/QZFZ22015742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab75b3e35e000742f48cc184bf101f9afc64a6a47c8897229d9e306d473e36f2. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QM4TW2115820.