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 0x2cc6d62253a00df6beaa285d8ec5d51d5e48aa9c0a867945436182919f6c2f40. 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/eecee290-0abe-43db-a0c1-0d68fd3c2fe3.json and https://artists.proofprofile.net/proofs/artist/eecee290-0abe-43db-a0c1-0d68fd3c2fe3.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 0xa0c429d8f78973a61c69e539367458516be110ae24e734e77555b6b42dacb6c6. 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/USX9P1165329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69462a057c3c69ebd4a9aa1146dbcda27f00d362bf1834dfeae27c5ea2e2bb5. 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/USX9P1165330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8206df45dab5b408d86ec23730873a2b095a9e8754402f7dc4af64e7fa2118b. 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/USX9P1165342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ade50f7ba679d9c99a1a97be7f5f9bebfc741c70cfaa3a948c70355a835a5e. 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/USX9P1165331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8da327f16edacd6ccc73c2d608d0515f7d98de4ca1c3da621a86a4598926d73. 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/USX9P1165332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e50ff2e6934d9c3f72953514d7cbda4fdd12883c929d27745534e7f9c962ad. 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/USX9P1165344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04b6115fbdb3d49fda098bd8a66e9c07ae603c55094fed623141c18ed9f82a1. 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/USX9P1165333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22e23df4ddf7b220c9bbf28e0c6c0d05ebc406534ce2e6c525ccceaf32880fa. 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/USX9P1165334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe196883839d3962b88b5812691f05ae914c11e55442e60d743c46e6356ebcb76. 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/USX9P1165346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736454e4e552b5cdd07e60a6265664942a3bf1438bc7e06c1fd3850325e04cda. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USX9P1165335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf76638ae3597e3dc440072272d894f3b7d9d21a3e11d94fa5d340fbe11df81. 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/USX9P1165337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1866f613d1654e33a9c3c53a88dde4c808d3ae495bc36f6ddd6d1cf3119c96a0. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T18:09:33Z), 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/USX9P1165350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf081e52cd4aef1fa797ebe83966d32cede8b8e0890f7180a772fa5cf9c455f. 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/USX9P1165339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c91c1a4b09f2f59b456e2d425e7288f71c1636981d8d9ea4c27f549d8c8f88. 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/USX9P1165351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09114e35027a19aacb966e8c105a6d99f1872041f1084565db635e82f57266b. 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/USX9P1165340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13b4ca16c86ba0d329fc262c9d12c9125a8993c76add15bbc2b14dc1777a474. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USX9P1165353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f79abb536c6ccd9269611f509d1c80681094397e6a4de5aeda6efe2929ef0a. 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/USHM21207024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215aff625905b81f133ee06294e1b7bd69463addff16c49b99467fa014aeb59e. 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/GX3Q92594340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ae15f9911f1a0d12a939c758dc6d3665eed75e6d786c1484fdadf7946220c4. 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/GX3Q92594341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e097162c47a55ab100797c8930116860fb3fac5181ade8ca2faadf48035314. 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/GX3Q92594342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23859dd4e5a98a4eacf8ef0e6bdd8bf13718481110121ffb7b1bd2f96fcdef. 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/GX3Q92594343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67622cfd9f53ead3070cd4c91307f8418474d0ae98c49192d78dec56c2d504. 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/UKXN22551671.