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 0x944b7e8ef838b70eebfbc1dee002cfcd90396aee8d5ce549ba30448a7e1504a5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb940110-aeb9-4367-8bfa-fafceb54b34b.json and https://artists.proofprofile.net/proofs/artist/eb940110-aeb9-4367-8bfa-fafceb54b34b.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 0x93d38c110b6e0da69edebe4df58bd4b5c5d28e34025cc7314749b9b4c70bdda6. 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/SE6A92021439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56bf553f76b983e40d34fceb848cfad07c53ddef150b1e62769a28a168d480a. 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/NOZ8U2101065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb668789b32a1d4bda17bd581f0646745f092694f4127e577926e866f802e5df4. 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/NOZ8U2101066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603dd0a5fd5b0c23db865e321be9332ca92ad4d86fa77f177ade42a2053fa637. 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/NOZ8U2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0aa3246464baa8a677bd8fa1fb6b7ca01bad79d293041b07211bbf49ed4fe4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NOZ8U2101067.
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 0xbe4cfe6da7e667fb6ce00af754ac5419bf55d12e29f6c0754b0dab9540f483be. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NOZ8U2101068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef6f75ba919becd740e13518e7d10983b957a1322b7fd24fa918e1ed654bd57. 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/NOZ8U2101069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec9c3b7bec81ad9cdcd0e197765475f1075b1f1dc1d26f7a3c32756011c067. 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/NOUM72400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3809da7e6b112b34b96d04c4b9c6bff7b0ab256902bd56e67cbb59e01d6d404f. 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/QZHN72171469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbbcd878ecf1ac780aba2bbd1ff30a1d2d2b441431b26cd21769065e3cd5c3d. 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/QZES52145335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37098dc98ef07de0c23d2e9e7aa4f063d1fc164505b02720df953d85720236ae. 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/NOAJR1900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d3759ec1c55bac3cffb7e87535b7221d0ad9e4669c9d5d795dff531e9ff58a. 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/NOAAC1900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005cc5a8d9563875be20193757be11bb1ca73c156ee46aae92dbc4d96eae3bab. 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/NOAAC1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e41a0a6345ed9ad6572d00469659a1c3b5db9307b534e37db449620e0f5c6c. 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/NOAAC1800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c0005baed2a3c9f0756248f5ab26b2a43434e6c912bc224fdaa957a8df5a7d. 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/NOAAC1800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bde86d05aaa4ad77272fd54e54b6593d2484a0b12432d8924723a562c47f9c. 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/NOAAC1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e930e2717a20141a5f052148915d83e99784d7cba009fa1659acbf3639c91fc. 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/NOAAC1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d2b9d29e6bf081cbcd6f9d50ccbe4e237d9ce66270c3badb3cebbb64f33bb1. 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/SE6I32423733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa5b3d82b15085a71e4dc4d9189519c4301e784d949acc09e132ce0e6871b3. 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/GBMA22400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb2850088fec8fdcdbd9816a3a04c9e4a2c8e2718396c7f0869be6a1f251742. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBMA22400959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68731fdadeceed9d334024ea6f8fa538d35d906455d316a202ba067aa4f74b60. 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/NO2DY2200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0791fa63dbf6cc7b3d244c5971c8f08986b0026cabacfc1f848f0d35363ba0. 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/QZHN92331125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d6ab37e30b5aed315ef985794e6d850cf80e98ecd842a9ba76ce29ee86024b. 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/QZHN92331126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59e15ff3f381e1ae7de4b9463daa3f9095da5b909872089f22d11349c4574a4. 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/QZWFG2310711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eccb3cb1ad0cd47606f5f58dee74eec44ad46118008ed548ebac76ed7440da6. 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/QZWFG2310716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc3fd790458f1b074e2ec19ad82233a687f6450f5dcf7db4e0474c906dd8128. 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/QZWFG2310709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3935218dadc16f0f14e9630a7bd6d6138113a9dd2fff2578ccadd0ba03e54626. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NOUM71900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ae147309a609577de1ed49001b7ae3ec7e1d4d80b265779cc5b006d1c2858f. 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/NOUM71900346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc179ca4cc5208c63686267ee0017c29de1bfb128cfd74659a9b3087b53e9cb5. 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/NOWUK2107010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a900edb05a3a466c3e5a821fab49a342de1dbe7fa16e66cbd6cc55178c8a84d. 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/QZHN92165845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f5e357be0780ecce3eba4767ab0300648e01ce18bcb343f9bff17e63ba68b. 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/QZHN92165846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b634b5ab9440d22ffcfebf5ddabb5303cf32769923e7a1b94c10afc9129041c. 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/QZES62108594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77b2624984944780c32c0d3021a8f738ec454458f857c2230d7ba0c38c613b1. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN62129015.