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 0xe3c20b10e054601451994307d36cf999784ebb561e7df37cdb3fd7e8a8f96648. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e65c080a-fa27-43bf-9e63-c3c5d0828f92.json and https://artists.proofprofile.net/proofs/artist/e65c080a-fa27-43bf-9e63-c3c5d0828f92.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 0x32a677b4e49a428b8fe90c4fc7e45c6cc135c275140bc0b05d7ed0da60ca80f3. 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/QZZ7V2542944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281a6f62cdda51b4e30ec3e068ca6140cb6020a8d3baa651b67e543c1e06d9c3. 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/QZZ7V2542945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d0b1cbebc7d0751c1a6079bff92ab8baf8146e5c04590d067f8846832cd513. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZZ7V2542946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a1ab4ee12d8c6fd936de7acbb42e79c4a8c7aebed932a62800e22d2731a82c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ7V2542947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2768bffb24c0746446abf1266b169aa15eab1297990b431da14aa909a21c4. 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/QZZ7V2542948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934563dfc689fe30853904034a1a86b01cb354999d659dc851f107d05f74a39e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ7V2542949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec974de1902c77d965a529587af3f935a4682fdaa764751169b5d03f498c3db4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7V2542950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef02df3af15894483773389afa527653b3c38dce48b816c7a0576fc2748bfcf. 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/QZZ7V2542951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ed8491551c791013165cc81b7e9c44ebfb155460f60a2e877a6e19b065be04. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZZ7V2542952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1455e1dd97c572f29bb82ebaf0735ae9565a9403f5223d2e50f0727143aaaff0. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZZ7V2542953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68b57942a3bbdfadd502b8b34ee37d45690008edf879ac4be668431b26c0f8e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7U2540645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc215403134ce1bbfafe394e1264b38681ae7a49c1ce40c155ccceb6da2ab65. 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/QZZ7U2540646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d33a046be5f7f95b3f3797d5dfe4af44a6b01cb09a3386d65b282d7e5851da. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZ7U2540647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e2a5797048b38f82083644736ac8197e88471e44d685acf4a6c4dbb7675758. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7U2540648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d04f5324b41c1c9727b3dbd55ffd75287590550459badb865a97fdb39232a3. 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/QZZ7U2540649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7cc9de0b8c930b4f7fddbd58b95a85839d121c5cb0656427a1d9ece9083b74. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7U2540650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eed305cb4431566e8056431b228c1efc4071d3755e7d3016b05c12ec2047b6. 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/QT3FE2581700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35832988ead0d55777e5fe401a4559264bd805381dc14f705b52b9d069aad284. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QT3FE2581701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf9b17e5d5e268f30250d2c1e8d306265cb7a4be575414db194852e8857ebe8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT3FE2581702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33fdf25265cc667ffaf07e06b703657e2b3f0069971e80847b99d964f3d00ca. 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/QT3FE2581703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300789b71640cc8efe254cd23e8386e95be4f7a2cd965db9a8282ecd7ecd49e1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT3FE2581704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdd62b2f66bc87c019413ca1611191e37a21b05144b081d10c5b902aa231cf2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3FE2581706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939ad8e84be58114bd6ab26f99c441d5c24fc36c88bad8f074e35cd9ee5c9735. 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/QT3FE2581707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d86554603a0695a074878bc40901b6b4def37a5bb12c857826ba68ad94043b4. 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/QT3FE2581709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4f138126749db150cd32318d7cfcb2b82309faf27adb1131096243980ac3b0. 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/QT6EA2591011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744070b172d73ad711ceb416b9324efe266555426c7ff807b2095615ba4b18ad. 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/QT6EA2591012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2506972c0765f8437ee0c441af1fe33ff1250294c5481eda5f25b268669ea69. 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/QT6EA2591013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe455e65bf65497956a805c7d14c7542a6103cc564f33aaef519a21be38be56f5. 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/QT6EA2591014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb319b3f7d73ba8fd949258a8564965b870d87bb864cbdd973ceb16a2558722f1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT6EA2591015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52940266c274789f8867dbcbb70abfe8d8bbd0e5de454ec41126836d0f0ed27. 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/QT6EA2591016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15b960a4a86ed8c036a91ea5414146aaf61357e46deb1a0069151be6d3b4b5. 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/QT6EA2591017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c87bd553eb4771fe1ad6d078fac581aebbdb39aa1f0f5ad977feddd9743a9db. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT6EA2591018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d81643ba06502e9e9aa8a2c570f57587434e6ea0909b876d393c48b8e28c20. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT6EA2591019.