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 0x2c2b2757cadb65d7b68d3eb819463585d6b65329c9d5d0682cce5ea4ab52d80d. 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/bf4cbbfd-64f5-4183-9733-0dbd3bf2e2dc.json and https://artists.proofprofile.net/proofs/artist/bf4cbbfd-64f5-4183-9733-0dbd3bf2e2dc.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 0x6d7ad6602fc431006dd15497aac1aa1312d371ad41313c649c25f5cc1f9e2148. 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/QZTB52427253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae05c7886d85df25b87a5833cf309055605454c957cc65d7bb0f501522cf668e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFP2300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e7c6981db28a6da7035190395e8f4a7d9b53a82d0f7c06ac70f88037fe17b4. 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/GBKQU2367799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9bf4064617dd915b0c23c08f08b40d3131f41b1b2b46a4854976bc5d3752b0. 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/QZRP42334835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba7a32755f74b5c94529f8436c4c970cd84c427353ed9084da64901ac5f0767. 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/US39N2309077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec69a44ceb4508959607fbc9f66b793561b68196613eb9c1130009d9499ab135. 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/US39N2203968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe482b4974941d7a9b3924775f0dd0350ebbb7d5776cfe5ed2ba9d05df9029ea2. 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/QZMEP2307328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee66bfbd29ff0c858d0523e321775b5a0588589d493e1035d85413bbdc9219fc. 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/QZK6N2367516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc91671a40580f73344f8c3456784b3db4836ac00a8b924f1e2e2d9e0b8d0bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN82301892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb2f96e68cc08dd55cc903a09e07b1a29f00458d234321f8f80ac3df3699cd6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZES52344842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dc270d90168d1b3598efaeb334a2a0a4bd1c0465aa04c95caf790295e91547. 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/QM4TW2344974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f5e15581ea8a246cdfae3bb0cfee4ea85ef6ea67e15c35493ad45a2fd555f6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM4TW2340606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c53c836e9a548a3bc4efb6f981621cb2e90bfc72ea3bda8a56e7806a345237. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMHK2259923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec69a44ceb4508959607fbc9f66b793561b68196613eb9c1130009d9499ab135. 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/US39N2203968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5737fa95aad937a78dc2041f843e5d71d92dc06c18650da9bb41a424ba3b403f. 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/CAN132200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a3b05f6ba2438dd57bac891c44d63f32fd948185390ec84170642cd5b7a7f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTAZ2261782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbe4aeea2cf7f4cbf7163f8cb6fe4ffccc7d6c99756c2b1e10ce82b0c4a64f0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8KE2212048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471b04bcf90ee37e684f86405176aeb69ddc854d2aee07a7c958ad7aeb11bc3a. 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/QZNWZ2298327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac1c98e78576af2fdd05cad42cc884c1e93410e3b3b6dd21164b43db40a1ac. 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/QZNWW2277741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6e8d11a7d15fc2d587c5923b8c9ec4717d4c75890140a9e3088dce65ef55d5. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZNWR2281174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc7b0a8a1015c35bac8152cdaf5f52c98acddbea05604a90951c722f933fc0b. 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/QZMEQ2225501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8768133cf74c571f8104ee3d4ceacf62a01c3c2d34295305f156b3bf8dc550. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZS662213094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69c57a8f2a15ec640d996d630334f332755cab55c5c1dd5eab11c464c97c738. 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/QZK6H2253099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bca8ff8c6420bf5f3f230bae4264425a3c2186b1fdb078a70eca98442864ab. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6J2233213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae470c16a95b03fb010dee84a676ae99b8399bf7b632c13c5c93ec7881eadb42. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM6N22249484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc396f957684d15442e78afca33088acd68af5d1b7cf04eb48a1a71c3adfe9f. 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/QZHN92237561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06b9167b4c8eaee35a97276c5c815a3a4165459d1c33b5218c0442b7015ed46. 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/QZES92281796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3053ef7849d3f596fe0d3a20141a6d6fa1eeb6164470f4012e1c14d714078b. 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/QZES52278954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae59ee26831f3e7eae1764cda4a9f60a41ba0673006fb67f299fa00e98603c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA72293123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f260f33bb43b0a8b81ad7923df9497d20b82012f40cc6e8b46efd89e3a942f. 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/QZDA42275051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6899acdf7d0f37baf0ba713dc58a96ae03fd6fe8a090c706ac12f76483e9afb7. 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/QZFZ42247620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5897fa4ab4944fcfda7b49250a7740df0c5379d9a2b05af278528fe9a43318a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFZ42280617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1585a551997a5f126e3a6104190bfd2445becf6d04d0e638a584f5eedc601a. 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/QZFYZ2253909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f36dbb224c11b903ca437d49f15cc24f2a4f95d26c16459901560c56897c0e7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZFYY2207516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5823367ac6d70442d601375b0d3846f5814262a1658eb8230640ddf56986c3b0. 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/QZFYX2249348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf734c188d82ee46fc49909aa1262282cda4967a6712d125457fc25dbe70fb9. 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/QZFYX2201218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6494d5d0509e7193f46902695547dd1811ea0c9bc3a029cb70ad30eb3d2165d. 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/QZTAU2105757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205224720a36ef35b0f2fa9375cd44cf70a185bb264e086686e6d28c33fb9941. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTAT2135559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05169ee7bd82f2f387dc60461b4ebc4b9afeb1328f4a9ea756617d27c022cd53. 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/QZRP52152096.