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 0x2f25a0590ae09d298f5eb2989e34e8392439b8938567196ec0dc62a2b89893fd. 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/24577089-6180-4e2a-9458-fbef1d3ab910.json and https://artists.proofprofile.net/proofs/artist/24577089-6180-4e2a-9458-fbef1d3ab910.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 0xd8c205a2ea9aefbd4bb2b3cac76a992f1d831a4bb39b57ceb41c5c687aa6fb63. 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/IL6652002159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d92f2d9332f6b0be65d70c29ffed2f103fc01bdf385e88bb0b79d2ab9d6f6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL6652002160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cdfccef5d766fcd4cb7a5c8221f4ac2758482c5bc7e590d17550adb5f3981c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/IL6652002162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b99d071edbf03189ce00d47678e1e72a883bacaf528dfd79dc1bab742f6b28. 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/IL6652102480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde17a3727e499df89706eb50438cc4b6dd725ae6fed73195e0b9e2d1746a6f77. 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/IL6652103271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf674b4af2aacef6b4f2a6a9728fd23b8445af22a71439a796257bad2a5ee0756. 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/IL6652103273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc15524693048cc5b986db94ad98d6c4021775339a451e1bcb37f437451554. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/IL6652103272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5a2fb59eb57571588b7d9ebd7934c02b5cfa6f77ac68c522f207b22251de7f. 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/IL6652103590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e0b5b6bada83feb9b1bef15b3ee4e291f637d8b9262a9079ea42252d5a93d. 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/IL6652103587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59375fdf33e97723a5e6d0d7d27002177ae79dbf455ded38e6d1e2e06f18f58f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/IL6652203700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e711a3c4abeadc1444c99ac8b357f0b72141b89aa23d1172acbb5ead4b2cac7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/IL6652203699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b3cb6bd11b127ed80546f85cfdd4301e7e8293f6c00327cc6c1be11c6ac78. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IL6652103605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16bd9d086e1a056ba0bc6d0ea17fb175d6f9662e46f3d3011abc4a5af568b53. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL6652203925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d612ba213a986bb9e74dbe95693d033ef1e4e1e3dd6781b92834dbd13fa70. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL6652203922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc570331dfc82e94ff11682f34d65478afaebabc5f73a11f80cbb0d7302f8cb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/IL6652204504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff5aa069f6912e518d4143ceb0fe76d9980c52c48c5ae93dfad846a1fcdb3e1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/IL6652204505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ce46e97710202bbc487d3f48a448a445b4c612089a65f1f74d7eb9dc07faca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL6652204964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd9696d06b1648a5e53e5b42d0ab5ea8210c598882ba49233a928ca098d887. 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/IL6652305922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2ffe95b5c45c446f57480d86f8f4a332405aa52383e8ca63f7da8e7d10407c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/IL6652306777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb474431586ca982ec1b5e373001955f7c9196779ab09c2d04601165018a92f. 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/IL6652306778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a560a5cabb25b45726b6ab39829045d9c0034c1272d478f0e5bdef9c3b854f0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/IL6652308679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfffea78a8ea139f1d22dbc36b82f6496f7fd072c53ea93ba0f50f94ab2250b5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/IL6652308689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b7854fea72d89b02426d5c7b82743391052c3645f6a2b4e2e45d3887de88a4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/IL6652307884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79608586d9544a196401861b67f13660a0ece80c32a2e16ad784d64807ef2b4c. 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/IL6652307886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249eb3eb39f50df208510f8131a518fc3e02c36c5d9bd3d0abe5f37a6b30115a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IL6652308013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c588424623d58435df66a1e3857bb97623485468e208cac0005f28087e0d894. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/IL6652308174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f016127c44b1c93008b32ec6f28c67d63aeccb763fe2b75a971bfdff2e1145. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/IL6652308175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeb36d4da0502d7590865ab731c39cb6600fcfc735e9708bf0b32e1cc68c986. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/IL6652308176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e08b8dc22453ae6b62ae05bd57443026039ac4abeda0f0bec98ea8716997225. 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/IL6652409205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802fee6cac0eabd6463ef8c9bccdbb3c6178adbd39cced5f6f4bb8a10597e7a3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IL6652409914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa644ba4dd7141c20217c085d5abdcb2ca57d29d110d16e5f9c81a612fed57d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/IL6652409921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3bd04d7283fb6bbaff9237751d5898983e9912d5ada34c995230fbc246a450. 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/IL6652409922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c168e25c515b04a362ae3f4f567a604406b5aa0c15ae6d9a275a253c829486. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/IL6652410311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564670e72b2be0ab1d8f23f7704cc9b5a6a7f367592b20579ec7598617745ecf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/IL6652410418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710a6024fcb736dd82bfcc09fb754653478c7fbd285625c084f695d45153d21. 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/IL6652410651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596d92e7dc407f39487b97769ea041291d64af3ad80924d469ca53a4a5625f26. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/IL6652410652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51425f4dc22701087c52cd091a60620fb6394573dd1e1d1d85f6274199edd686. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL6652411003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686a366a2ccdd36f41b13955aa1d002732e9542adb89a28ffdb802a50a6085a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IL6652411004.