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 0x6dcf22496d048bfe216f2251bb8e0320ac51f96ea54dca9df4e03cf0abc705fd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea2092d6-821c-49c7-bf57-3ed72d8a36b4.json and https://artists.proofprofile.net/proofs/artist/ea2092d6-821c-49c7-bf57-3ed72d8a36b4.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 0x3f1d848425c224f4301b62ec8e0480412962ccf25e4e7caa7a9b98d5dcc21279. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:50:48Z), 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/QZHZ52120307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6575885eb983986ad04531432332ccf9c39fd34d178af1a230ee9341540b75. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:14:34Z), 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/QZHZ62151146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce39d494c37bacbc3249a913f5f85d0717c8abe513e1ee915fbfa02431e528b. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:08:56Z), 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/QZNJW2269424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1eebdc8d06abd22cf115e9ddc7b5500cc531c3416a8c6e6b9255745460afc4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJY2216736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf187c2d340fb7a60e2f94b83bcfc7622981452271ceb191bedfad5803f338b3c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:45:38Z), 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/QZTPX2204601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc238206902c1f0f8237ce4a1e3c8cd4381b33796019f8462d515b8cfa4ab863f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZW9L2242734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82659039bd8883f3f5705d0cffe60981f53a7ea51896ed18c9ef53d289e9bc54. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZW9L2288584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a3f1a9c4ed7e2b6a625426109548afa7ab44919dec1e63e48ae86074ea69bd. 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/US7VG2399397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4a849ff5aaf0eb726948980a345027b779d345c003baa0a14b406a7c03f589. 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/QZNJZ2301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de1dab79f235c2d5b6fee760e56654b3f515e5c45aa9c6524e5dfd227de3ed. 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/QZTVM2329776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f72bf80bbe045f6d76086b0aa0aca6a7e93ead729932ab2a201ab2e5e4f81c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTVM2329777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173d7d8568c6684ed0eac1d469f513c228d23f078f135c8a458eb6c589b8b915. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZW9M2332552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630ec11340c425eaa4364a399025dfda55297c92760495ab7d5d714862f0366e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:10:01Z), 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/QZGLM2477572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae0d6495c3c47a8776e2d32fc4aecd39135779088896f359ffa8b4f651d2d3f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTPX2587382.