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 0xc217490bce3674997582e624ff90fe36856457e9284768e0ae1b90296724b427. 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/ec582333-d817-49ae-8b44-a35f1842a24e.json and https://artists.proofprofile.net/proofs/artist/ec582333-d817-49ae-8b44-a35f1842a24e.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 0x6863ae7902b6d6c6819163e8428ac846bc8eaff0815eee0d4bdd937d5319f0f0. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZFYZ2103247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa309afc040d533ed4572a6abf4968ec82ae34c7e0c3a090817856d0d7f1bf39a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZES92244503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64790accae940c39ce4201f36aaf7ceecf60ef4b5fba4e051568871b5404c2c0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZES92244505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276a0567b9bfac79248ac8adf7868a15d9d979f5b8f76ef9846f9822b4375e1. 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/QZES92244507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af74d3610058d7305d2a8636663c3b43ae972874d15a407ddd7e56c6a015112. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES92244509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7ff4233ae75d555cbda31a89a0f9e367c4a98dfda1faa691f227d24629777. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:34:20Z), 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/QZES92244513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30ea74efb27d3c6f3b0823337ab5194c4210613091db274c7be2dd9590573a6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES92244516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563976c114befa01e6ecb490620e05e7d0ad24ac92b4d3f99d94321da0e3d15f. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZES92244517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b3a31e0a93376b64f62bab8887634475dd98ea29fb452656eaa7c7e26aeb7d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:47:27Z), 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/QZHNC2225175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1a516c9688c3c00acb9e147c672aa00ffd86134ff7835b40a589a4cf777635. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:33:25Z), 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/QZK6Q2205334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dc40171e2522a8dc38f98b0351bd808aab2aa73aa63c83f0dbbfdc58392691. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPLR2306136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1851d49033d5cfdd50431c0253783ae1555e26d3d8615afe6bbea6da3e570e42. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZPLR2306137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc584d5726c5adaa3e34e3d3674c8fa100bbbef4ba37eb978b775243c617fe4c8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZPLR2306140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03e3227e29600ed622e70869d8fa5ea0f4b079bb4eeb845a1a9afb4f3a01ba. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWR2282701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fea34883f82be03442f5e0ad676510113952fec9eca1ce77ca4dc9af9a3b60. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWR2409351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30602b16e9aad4d3b8121618bea4eac0b28486086685662b26060e23bc7aa07. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFU2441768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e36e45cb450d3d322f45f11fcbd404130add742a73bc63b59a3347aeb8216b4. 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/QZZ7V2403096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142f18d335fc8317fa9385bce50989322a333f73d11f14f29bec0c295be8a79a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:45:32Z), 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/QZES82589790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4f3b34e1fc75d494845a2f96596d07ff70b8ea1a7cc139343e61fbe9d9e59. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:41:09Z), 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/QZNWU2548625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a1f69434c821e9cbd9db2f8a227ce1809b0866e6e272008bee8bf656bf5508. 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/QZNWU2548631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bba988bee1296c305214fa5a316bb10750d80ced0485125c2a1b5fdf304eb63. 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/QZMEQ2034068.