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 0x363fc127e4841b637e936b6705247c7f3a8ee7b26a51828d07c518199e99e4b4. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fbe6eee-bfd7-48f3-8868-5ae700e1e5ae.json and https://artists.proofprofile.net/proofs/artist/7fbe6eee-bfd7-48f3-8868-5ae700e1e5ae.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 0x57b4a4ffc4cf8fbb4b632d9bfb4830bb9eb5d93e0de53c2acf91dfed54312c9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATA019400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d9360003c19159461f9a5d4c64e23ae627bfd6ac6e9e6c3cf3dc77ce9ac54. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ATA019400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0239c9a8460f744d799d89afa9313ca5dc119f357580adbf5c6b9d3a96c3f8c. 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/ATA010300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a094aa91fd70054196e604c7f7fd7482cae072d0a067ad82bc9b2b72da8f1a8. 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/ATA010300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491f1e8a862b20d6766c533b84ce0cb700df13a4c50b96cc49371b1ce3ab8976. 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/ATA010300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf787499aeaabd460dfbcb96b3aed213a5e7743f2e656bc04f6c2347cf0f320. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ATA010300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1166febe6e8147443555eb5e751fae527170fa67b88f100c623454a425bfc53d. 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/ATA010300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa707a6b00371de5298879ac4ca43250e5351e853843babac87be97a3135bea16. 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/ATA010300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf45c88b2538fc21f979c947b76d3dd8f7a57c9b8b945458e9c39954b00a83b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ATA010300376.
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 0x76365f9b281aa90c2756f067af99b2ac05706ceeee24f5e8e2123c7639f6c34c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATA010300365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daad8c9613674ff2a5c21b4f72fb3ea6983a057e71ce0d3ddf5d5161cb39293. 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/ATA010300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48ca8f430f0d6afa4371f64a3f0fd5eded1e2ec77347ae53deb5270ce17bd4f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ATA010300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6bdbc45b3a599cfdfa69f8f0569c0e5c97dcf73dfae7c41637330522937d44. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ATA010300366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5b1816a417e657fe8af99ff8e578ebafe620fd4ed044e7fa618f333e1b53ea. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ATA010300378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08121728833c5da50fae837449d90707fa282a1109b1ec5bcbaf3673aa66f6ab. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ATA010300379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e79d5023971b13fe344dd88514a91fb810038d199eb069b6a048a9e79639a47. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ATA010300367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974b10696e233b09a5459b37a3c09e12b31ed2216b05e09dedc449a99a718b05. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ATA010300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98faf423256e1c413059ab56ca292f55cd9065d9b784f46afe7fbd09c237c190. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ATA010300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90692f1fa6fa14c1991392675e90b5e928279ca957a8683e30c31d3dddc82c13. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ATA010300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8b2944c551e79971c44dfd86c0f19d4d30275314f2a3fedf35023b31db4cf8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ATA010300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd2ee779dea6f66a8f411cf33df2b31f9feac04895fb910ac81843e5bfe5ca2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ATA010300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad569c7c718f18ec6662c5e5b04d16d6b45f9a621fa7164093407f8f073e35e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ATA010300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaafd74e9fecaeed56bb1d6deaeb4c0a9ee2f55bb8c5ec116c68536660760c1b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ATA010300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6925f4e1ddd676c7a331744cbc37d7442d763bcc7d60af93e2a811514a2cb618. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ATA010300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596b1d4cb9ba06e6c84a8f3ca535669ff57788f7dff5d27f981e8d327a1112a9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ATA010300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f52634dc772266a639243c02419d20d81466ffe992f6eb2ccefe4a77d4b4e21. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ATA010300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa239e2973e8f2b5baafc478e5f12a0b3533cdf8c3a41979548860a5efb956080. 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/ATA010300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4fb4b2577ac65956902199cac1966baf3936fbf40fec9b1e5841dae8d4472a. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ATA010300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc52dd71048b9d6e26cce76f5070975c00661df7d1ed405620c1d9b5a24c013. 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/ATA010300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350112de7abdf4112868964a52218b7ba3ca4d9bdfc24b1b853f51c3c2dfe0a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:45:41Z), 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/ATUM71100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9317959cbe27559446fce4aaa31c7a3c791ea166773627ac821b05f56e5210. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ATUM71100359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc485cec702d19571bc44702aa01c8e2646ebae5d58315e746b53636d14b71de7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ATUM71100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece17d0acee8bbd646a4a3b210ecaa5dceed4ec8012fd8687137dbdf144ecf0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ATA019900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5f04011e09aee28008f755f6181a904e9f19cc77479a1dce62d4452709bfb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ATA019100160.