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 0x48b82a7dd03214f12f339b4bfa947e144f04fb7b376edb91bd2dfbb52dfd4bd4. 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/d658af8a-27e4-4324-baa6-e56f488b6358.json and https://artists.proofprofile.net/proofs/artist/d658af8a-27e4-4324-baa6-e56f488b6358.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 0x049032be4ebcfc03d48ebc4a1d72d61857267943c52cec66c9ac98dd83235778. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES62201761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08299794d7454a8bbce36e2b394e12b31d6a26a1758661c948571ad9137c128. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:19Z), 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/QZES72295205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c330ebe031ad8f4625dbfd162ee3c64564eb5fc67a4d07e5b3314f4d3c1b489. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN52247028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2936bb13333c7d5c77b5e370a482b233e46a08393c254c5a0ea8931c6608e9e3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92289704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1409124259b50824e37273e1f1a012b8a71a337dd18790ba017e36b8c5418cc. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZNWW2229907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292e0e3f96a140ac329fa5301797dac8c1f2b075154448d9a3e6cb95659ff030. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZNWW2233151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f1f2681506e6d3afcdae74958f61f0ba000585b4f52cc0952a5525ace0b198. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:53Z), 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/QZNWW2229912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f5063b0ee351222e874f01aa69eff63007dee74a2400cdd023c97155655ee4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAT2246797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2937874449664baa0a0a8e49e6b1e95a9d57dd23378f30c9d3d64fccc14e18f6. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZES62357383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b3767dc0d377767f54075629512a0277550b0a8811a1cd9fd436fd6ce7887. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:13:31Z), 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/QZK6P2382952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf583d3016df6666fa8ff88b9f3e4d5d88debca0a2c1719f1e43d95920cb0f3bc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2326692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ebdb5ffe42b4357a285ac7d0bd5dc4a2c684d6ccb92508375145c54f2ff0ca. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:47Z), 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/QZNWY2396265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1becef546dfc7f73a21f848aa22d93beedf40b90a4c5637e97a8dc5c735b598f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAS2332950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87c400ba4e8111c476a8c62cc42c556c173df511d8b0451986acb8914cfe0f9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB32341195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c3033602e6fc71ca5c8faa12f6d5d537cc3f10954ac4032f58475e8296c5af. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZTB82371597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7284e825f1e86adeb5eb87e63f45dcaaf2f6b776337ecd44b6e526a580ec9c92. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFYX2449506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4143421d9571e78c3c013760315096f7f5f7cdeabd7e9c7fcca5e3b00854896b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:34:22Z), 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/QZMER2474974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7726aca6a28508c3c2619502b3c732392451fe6b4fbe919b97b455a2d2c79b. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6F2499850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24597b85de4cfd7ef0cfbb8a9a7856df14ebe7f4f3ec51a2f314d237ce6d6d93. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWR2436334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c191cb3940d244b44b6eef2c0cda8458cbc01f50c088e428c891138e9114c48. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:58Z), 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/QZTAT2476576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591365c9fa060d1bce5de052a260163d0bee3871afc6285e7249673394b04103. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAX2404953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c959151e8d9489862acab9bec72e7761955670b397b65209d6560c84fa8753. 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/QZTBF2437248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd496ac68de77dc69713c87f7813ca1c716c2e8103ac6eb4cedb9635029824076. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F32418202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aeb0bb9ba4aa15acceccd43dcdfd7c6d330aa48bd35e4a6b52fe30517587e1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWZ2514021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ee365ef8bda7628f0304e13c64f6b42e65f595ebf13dbe8c145bcd9eac6c6b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F62535206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e7c0cdab6722a9cb25bca24d3ca74771b1fa23c35978e30790f724837e9d4a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3FF2559886.