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 0x020b7c92676fe1dc7f2b27d0f1c50f34c7a4196d99a438baf1f1e00cca9a3bfd. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8110466f-ee79-4b91-8417-f8a35da7baf0.json and https://artists.proofprofile.net/proofs/artist/8110466f-ee79-4b91-8417-f8a35da7baf0.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 0x7f453bd01422061fe22ed7f3e4e4f10ffde9b77d233e1e1761c8e481fe3fdeee. 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/ATA019000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaac58c4c142614918a5820f9bc12c263a3e12eaa61f667b1cbdf85b805b1caa. 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/ATF068600830.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37084a0c017df650bfb31c96f9c6901efab06b4039d12ba295d1c0866cf86369. 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/ATF078200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21dc53d446d38e637fc183ab7426293943ae6b11234f6bcd2079b1c1232ddf. 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/ATF078101440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a0261093db078e2122f80d40b5d097f1768f4eb3d55d2d8f18ff4b25bd2673. 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/ATA018200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73871cb636ccd793b33d7e871786b0e04a534971b7efa8bd6f6e390f91b1d12c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ATA018800420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94ec2be829d21e8a2b23a85dca00ec6b74bec9d779ba8c3debaf459342b7aad. 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/ATA018500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2c8ace328d3297589ca4adeaa016de42dd455f3e5cb54b85de417171de5d95. 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/ATA017600480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d03a74b69ef36d908fb03f1705deeeccf0812abc75bba414bb13430d37bda6. 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/ATF068101350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde038e75b651eab16324244dcf19c5fe7fc4a1f01dbaa29bde790da1b6307609. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/ATA018801190.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0239c9a8460f744d799d89afa9313ca5dc119f357580adbf5c6b9d3a96c3f8c. 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/ATA010300364.
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 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 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 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 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 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 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 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 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 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 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 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 0x3bf787499aeaabd460dfbcb96b3aed213a5e7743f2e656bc04f6c2347cf0f320. 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/ATA010300387.
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 0x1166febe6e8147443555eb5e751fae527170fa67b88f100c623454a425bfc53d. 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/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.