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 0x015082b44928f47131721ca6203b2bedc6740552c701c7f8d239c4f8305187ab. 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/818a47ce-0f7c-405f-8040-a4c9db3e69ab.json and https://artists.proofprofile.net/proofs/artist/818a47ce-0f7c-405f-8040-a4c9db3e69ab.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 0x131fd96fb2c90bae83af4e438eefaf160d1e5a1319022abc9843b7b2a79bc084. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/NLC8M1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e158a48d458c1fa9f3d7b09751bd33480f8d50a53468bc7032ed697b729e6. 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/NLC8M1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d4e87e5dfac6309df46adf2a2fe48820baa87e0e3e946d387df57de626f6ea. 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/NLC8M1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e364439d9a59d64773b32fdb1dc55e9d2cd64d60f8c71c913afd9fe9e495f. 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/NLC8M1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4418a8971d4b54c96c8b7af2d177ad0f5a5f359f92efdd733aea3a874e824eb8. 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/NLC8M1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182c7fd575f53aca0cebd3e020431428ea91fc5d385ba0f2f0b1c5eb3efebb1. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NLC8M1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa862b8a5ca7a22ee3452fd3c35386abe23ced757556d90ffc0a006e81e49dcc. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/NLC8M1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e438e1c16163ab34acaa9d58bc28e3fcecc125c7eba5a6fb4730c9204e9d0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLC8M1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0a0f79bc5b4dc10a7bdb9b596be303eb94a18c70d1b9a786ced9e568b4c55. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLC8M1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb31d5b635af31fabf168c54e07038deda9b9654b3d26be34f0b4ef017f3e69e. 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/NLC8M1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb94fdcce6d7f3ccc3c23cf7950caf85feecf3109119d9b13999e1ecac61b75. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLC8M1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cf98fd29e91d0c7a35655d184cf21555d8ecf7865356b225931545501957c9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLC8M1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f13c60333d03be42c4febb9c58eecf65d677fb5bc3161e61ec3fb35d45764b0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLC8M1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e438e1c16163ab34acaa9d58bc28e3fcecc125c7eba5a6fb4730c9204e9d0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/NLC8M1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd4857e81f2b13af14d63b18270439e8f07d6926f6ca5c6b622194a54060c6a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/NLC8M1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0a0f79bc5b4dc10a7bdb9b596be303eb94a18c70d1b9a786ced9e568b4c55. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/NLC8M1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb94fdcce6d7f3ccc3c23cf7950caf85feecf3109119d9b13999e1ecac61b75. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLC8M1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe511f40e868f048e2f56c321e2a44d6500b16b2ea3ab01515555a91aaa14c815. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLC8M1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f1eb011c1502d1041a0d71d833d3c156673bae967cb5ce87cae45669e5f467. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLC8M1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f64dfeb56c5fa9cdc786d9ef7a34b354bfdd624cca76452da81687ae0ea9481. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLC8M1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4d4d9f7d7160e080d1920dc8f72f91b6927f2fb1ad91c60266c1c141b73af. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NLC8M1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaa72fda0e057798f5bbe5cb7642c9db4145aa6da6308b2a772cd910e9f886d. 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/NLC8M1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b460bc934f3b94a1cef710d72b4748d0be12f6037fe00711826dbbe8936751. 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/NLC8M1600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2af3a3e366d45ff98bc45a09cd6c3a61ec667bc648b6a9037dd8bde7bd36ec. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLC8M1600030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cf98fd29e91d0c7a35655d184cf21555d8ecf7865356b225931545501957c9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/NLC8M1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f13c60333d03be42c4febb9c58eecf65d677fb5bc3161e61ec3fb35d45764b0. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/NLC8M1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e158a48d458c1fa9f3d7b09751bd33480f8d50a53468bc7032ed697b729e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLC8M1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d4e87e5dfac6309df46adf2a2fe48820baa87e0e3e946d387df57de626f6ea. 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/NLC8M1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e364439d9a59d64773b32fdb1dc55e9d2cd64d60f8c71c913afd9fe9e495f. 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/NLC8M1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182c7fd575f53aca0cebd3e020431428ea91fc5d385ba0f2f0b1c5eb3efebb1. 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/NLC8M1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da9d145b3ce6812f5aa6fa334db5c1899b84f0a299198f2f8466b701b7a842e. 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/NLC8M1600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc345ef5a28c810f622fd80e6b4bdcaeca1e650c8fb1be3cc9703ead0072cfa98. 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/NLC8M1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cb093a959ca4532567fb6f9521bd8ef18ae5c9ecfaec01f95f6ff61f7f6fa4. 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/NLC8M1600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415b0731c9e8a3aa5f52aabbb98b0b300f09a2c5e6d76b0e2a88b15e4286aa1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NLC8M1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c281d5d7766139255c27a78e087e8d33a30617f7a59251804a6f745569f9a57. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NL2DS2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41bec03b05fadbfcd565789d7abf9d9e8a36587d4ba180a8b83b1fe67837496. 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/NLC8M2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57884856aa70bea806e60748313c8cbb0be16179199db6120d16a6faac0b6c5. 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/NLC8M2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28978a21dbd301e8c64757ead90780d81349b3550c4bd25ba88de7d8c4e30a3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/NLC8M2200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409178d51944e5dbe0d7dc270fd5fc928909c53c41f8c451e3575b2aac795e6c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/NLC8M2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac9885b4fa3b6ef90d2a4c309f47b4fdcb857c79e1e4256f26201f6c34d72f. 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/NLC8M2200069.