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 0x31f903e762a3a3667313020a36013dd1ac5f86b5d0abcf37a878a9f486422f0f. 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/6cfdfa26-0b38-416c-9e1e-ed7284fac783.json and https://artists.proofprofile.net/proofs/artist/6cfdfa26-0b38-416c-9e1e-ed7284fac783.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 0x08432848e501c82c7fbdf4c30a2d69da7c665c1d4d84f6a1b5f227463771e50c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US7VG2276136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d4c006f9a3720fd531c051b26f62dbe4056d7a5098f1c07924fd4a0a8768c7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHZ62229267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d75a27f2adb1f91481b58e1e8f7c7c93cd65285592e65549af9fa2fb386c7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ62234000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff046673a83abb9f857ae38872fd3a65fa9884a7550e8fa7fcb65ac553384c4e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHZ62233973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690c218dcf7ea68b082c88a160b55967e558946b3dec695155b1204419c92e4d. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZHZ62293374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685139109a3093de9edb33e98c59987afc0bbdf957bff6d42c0165f0f5ee6a0. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZHZ62227893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff53119fbae534cec371e34969ae45a3e4bd5a6415a07326592cb4fd273042. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHZ62227857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb110c76d48218ae84d45722febf4c932cd02b75f38adea3433ccb5d81ba4b0e4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZW9M2273782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e729903d81b76f706ac7be90fc0b8433afc0ae39132818866b194d48bcb1ff4. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZW9M2273783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cfca70376ebe2798f7058dbf11eab070b95895988b49de605a2bf8140c0840. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZW9M2273785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564c4614be508ba5ca726196f465f8639f6998974171ae9bbb52b47bc333a344. 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/QZGLS2306575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae60d8aacfa9e6e7527634646e6f6013468756e4dfb8602693797551e115b796. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZGLS2306576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43475364785b48276d8b5ca540714cb44948a0e433dade7ececb180f33028515. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLS2354754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0827f9e80fa4f3162ca4390ab56ad8b97d31657c6d0176724f92d897b668419b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZNJY2392132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a78072e59776722b3f19c5a29f7d2b4bc8c6d21b2f342eeb3200a5e9affa4a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BKNT32300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87cac165ca4ee027d18cf61d4b2d01efb23c0c2f88487d7dffe18de1db6525. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BKNT32400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5b5ca9f2112d0e4c1035b24014bfe7d43ca9a1a6d76f33881ff9deceb23afc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNJY2480889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfa80729ec6bf7787f533b049bf5bc7c6d1cd9bae940b877f20ca8f2ba0e9c2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJZ2479676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfe8e79a19a185502c950bd05f1507efc9ce6e40945cb6d643eb55b129fbf82. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTVM2463162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63cec7e67f0c17e4802034ffb5ac68ce2cb309c7b2d695696a1d31cff292e59. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZW9K2483535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba498ac395e6499e922dfce2bf72e2f07d635e6137e943fb091c7fb814bea7b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZW9K2483536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac62debce349c6021b557edaacbdf01a548a468d9aa6f7b795080e8ca470e8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZW9K2483538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270cd6041fca1f6ee83bf2b94d6e9ba3a71ac1862ec3da75e9dd9a768c0ca6cb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZW9K2495236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392f74d37511403374714a60ebd83891908c51a674d628808f835beff12665d. 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/QZGLM2583692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccfb0d5d434a3b79caa8781470b4eb6ef194ef1e5d0cd7cfd152dbada199a57. 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/QZGLM2583693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7835db69f91d459447131baf87763d5b4c31e06932792f4d3f260554bb080e1. 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/QZGLM2583694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca1ce2537c63c513978fb9cd6baa95a657586af9cc40426f122b79e9241bb8. 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/QZGLM2583695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d3a3b448be0170d3ef75b10db2908d0bc71b481d25f0599e8ee58170301ff1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJX2592249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bd19f8575a9c34fa8ba460eb29491558d84ac63e03569537690f82c1972122. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJX2592195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8d13873f604560d1ecb089557eb492290d00c47c2a5c587f1a122d9f97d6be. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJY2505338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043f91ae1ce4728dc4203dfb1bbe8b8be1fa3d5deac2336e4a3d443516cd4b41. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZNJY2531419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788072b05f4521909f01d29fbca0bb075e60e542beed514d13522f59711cbe68. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/BXTK92500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d6e9e9189ace1a6a596f312cef87ea41956c6d4be6705e8119ddaeb589f727. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BC0902500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105bd2c3dc4a24aeb1432fc2bad33e272bb51951409c69d83098af2507dc72f4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZTVM2565594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ca68dcea65d4cf1f42d80dee0b157e8950a90bb6d6c109ed37dac756ae82c2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTVM2565087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d2e0efbcec919e6f21c28630de50e541d27de5b3c3b36cab60a3f90c74226b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTVM2568546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481053593433f1f46e9d85caca11c4efafbc864b48f6f5fd44ef770ddf42fe78. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTVM2568547.