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 0xe0aefa655c2e51126d948634f5ee6fa36c7405c52a184738a4d45d61d73f902e. 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/80377c2a-61c8-4022-b0f6-7854d0852435.json and https://artists.proofprofile.net/proofs/artist/80377c2a-61c8-4022-b0f6-7854d0852435.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 0x2297ab849a436a78a8c3a38375b7618073513f66dd480b9b2a26d5c61ed46923. 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/INL412304884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01322c262991547c9d2552acb2b95c0cffdf12c03730641c7e9ac918e23221a. 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/INL412305678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16120700b9ec2b28537693c2f396730410d70d3f667dc02fd9faf1f11818fe33. 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/FR2X42409042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22b2ef8aadae91c75b8316c23a4bf27063915a99727a8bcefb601270799f6a6. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/INL412401086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba92ba1c4a46fd88a9c5ab1047ff9e845aa7f84cf85470b8bc02ee75cff9bde. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/INL412405148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b4b46f170ef70a622439691c2b9edfa4087d2a607a24b782dc0046f73e67c7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/INL412406761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c97a21a0ace986b980b72948c6c44db95296a37b89518073f52e112e553e40. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/INC1C2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40491011219da7a8850c5518eec97a8cb6149bd5d933cb6f4aa8c5978791172e. 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/INL412400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab9b5d377122e7f0ea54bb7ce3ad2b73f169d9b7a264eca8ad580817c192910. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/INC1C2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9a30accd3edec4d6e8c1a38116b080e5a0c69e72383bb3e74458e439e8f19f. 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/INC1C2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb81a1f9a95803c1132c9b83fb406d1d02ccb7695b0d787a0cf265b4b6b5c19. 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/INN242500676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82939af72dad5ac35aa83ec34785448e69294b6ae863793edf7daf19593931e5. 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/FR10S2500763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b440668a1e4aec38d89a4a41a7b0c47a3a65597cad69019d344f9a55c0b06. 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/IN1SC2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b481f0ac5fb6b816b59bdbc212ca1651f731e8080d3d17198d2d3b8b078ee19. 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/IND862501088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3553f5cf3669c999f803ae89c5f851cea5960f4c95e09c10006045a7e030b15. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR2X42558978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15d953c66163cc7fa7428a4253a45fc1b7a6cb1687459841918e7007cd4d868. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/INL412501208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4f963e2027b84ba872ad6a47787774419b1639df489062704c736c0c86742e. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/IND862501308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191a237efbf4b6ef2fa2178c92a4b8df12b4d6946b4c35b74afa49e3563f3ba1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/INL412503692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fb28fdde12c4c634585b09a5e4dc54fec07842a5471f2ba275bae315269d25. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IND862501737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4eee5e09dfbf6b235b0716d883f20387da1e0fe544df32f584b8b7170ac8c4. 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/FR96X2595295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b4ed42a965fe820d3fe2a4e4574377e9479e3d67cb769a2df5198fbeee84d7. 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/IND862502803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49fe570458d44c018a47575e49f2e98849a703d896f095d8540a5540510d0e7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX282500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55156edb580607867f132daad8fd18b44e040516ea5f269c139001ce3164ed62. 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/INL412502848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc453472a5696c07bdb3e0ea2a36b5cefbea79a53a1d0747170c732e5b707039e. 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/IND862503578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63021a13aac710da2a69bb5119b8ceec50b95703546e76845e5b39817a564516. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/IND862501356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84750dee19a7a1f7881629110d9c25365c5e81a3bec3b386fcbb3faf5c9fe2ce. 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/INA9L2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e25b0d132ef030ab81247c627ebe5273e704e535f70faaefadf02dfddfa494. 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/INC1C2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3527d6dbeb7b033c83cf7083571edb333b22ea3b12887f4d8f831e95d278ce9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/IND862505113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef5e5e0e0f18b7a6f4e671f0b95d2719e20bc087ba2b7e0256aae5fc23affa8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/INN242534710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b76ae3ee07ea7750e748ebc87a1760d4299ffa5b0a33aee4b960befeb0aa158. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/IND862501381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bd57d1add5f44dbafbac5367e198995bb7a15d2e281ef697d4efdaed2b349b. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/INL412504742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d04db86bdeffdeff0ac671d9d20178275c24d1317f18508e866709a2884f5ce. 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/INN242540803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772e017ab1c23cb3e3104c4eeb16726d0185f8812de8a2d5e25b6a7fc1d4d153. 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/INN242542396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec6c6545191d24e895594ed0bf87dc24cf2a0e202e4773371d73346702ccfec. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/IND862507579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aef2cb6ff48b07d0a37505de07213f935e3bcde4c758849bda6e6a42a46d440. 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/INN242543269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7cb607375c4971dd39336e2e2dd6df8a799e760c73ea2555f92c442c74ee73. 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/IND862507717.