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 0x13acd231f2e06d400b3e8ee5506d7d6817c51c6b0703415014399730f0415861. 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/40e3cd57-b5a5-46d0-8b27-a5d56e64a500.json and https://artists.proofprofile.net/proofs/artist/40e3cd57-b5a5-46d0-8b27-a5d56e64a500.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 0x5041c611f1f20019591e0eb7043f9f6b96b41177d4c4a2bb2f7cfd1a97c7381f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2557817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed2b9135c5fb26a7bcc21df3001383c0e8e7e2fa9db88d8595e0e05cc151327. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38Y2510394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d9ca0bd786b4095c18f83de860d85946b3992cb7c14c9bc778090ca4451a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2464147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c26def9c23c077aa32f7af42847935501ff2fdf71ac5dbcd54379b0394b67c. 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/FRX762426171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e8b8ee6cc5fb51e0d6e0db8d43d3dc742f3041a9ab84e2bb137d7390fa79d. 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/FRX762426172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52ff608a5258f23a59718e057b212a063207f8a50f741430e12a0e31074abb2. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/FRX762426173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e7f3d17f8b68a2c4f4c23d880f27158a4bffd706e93c086e2981e0be7e597. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762426174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb323d613040df2d8ad60f0cd6e74893b1e6a027093e63f9b78f3282e01d64f92. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FRX282453361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bc5422b188a47515fb5fedafaf26056c87d484f3614b0fd07aca02e58022fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INSD11936387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cd5ffb9c7adeb0c198e07cadd2a89cf272fe0d6521e670c5bc6a2be3793307. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMG2362124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73ef2505c230523b5150fbe7bd7d6de5c01dc5588e496836950e4ca2f6c98a9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INH682300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ee6abc3d4011f34023aa4a280cebc0698d3082a1c71ac07271e3b1839223e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB92382418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95935a5646505d8207b09fb669c968465dbe680d34b2b278be82a4bb0912c44. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INH682300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41a23d1697fe6cc19ab0d8b8b9b852731afea6ec9d85c3d9d4aa474f7fca2a. 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/DGA052314842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd045ddc7982823d6a95a9cfe98b37364a5bd89bf479ce06af3a6e9027cf8e71. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRX762376042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6360c12d181b40fc5da1d47a7a5c6ac76458cde6d19ba37d50fb8d2961ede4a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2428772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed3b0ccf90513ae6d9c71c96e4f697804d6c2e444f34009b79353980e07c27a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INU252308437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c615eb9f1a9725a10ddd8eb5c9ff6e407c39d60ec26546b9c315e88fe2c4b7c. 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/INU252308182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278404bace88a45ee71328bd471af7556bf3e264f462c0060c7e5acec618aa04. 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/INU252307759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77d6b9d3a458f615e06a286ed62c8abb8060d89e14cf76528c14c579b930131. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAGT2363142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813eeead10c5f05466874046a9edb0ebe7140b8f0667086b3889c47dcc05d8d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX202252328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751632e6f72a46fae16b85aacbe725523be13af8341bdc027e592ee8e134fd7b. 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/FR96X2277863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3a3c60cf62acd2869e99ab3971784fd3173fb70f910fda0a340e775ee3e9a7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR96X2283585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3474b6de3b21636c4e811f1837c892d688160c602ecea90eb04e1c72a79ccf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW2236251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc23008b3a29ab033a153b80423ceb6eab156187dee33c30e0206d7ae1fa8ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2148611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506616890d5b9de9a7fa21cb5817f257d999d854a92a8c45ba8e25bbe84da910. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INH612100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5f6eb5dd661ef878a6ba29a10705290106f0933750d5136e408dc256d97c80. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/FRX202109501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4a8a21d092ceb55c56eadd760722f7e1c695c7368dce216ab20d907d0bf4b4. 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/FR96X2109581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903048e930b4e6061ffa4bd8518f2d52f953b5d49b0a4f45ae1320e6994b7594. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA072175065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9809300f46f62fd7ccdd09240deb97bbde870d467cc83565f2b8b75851691d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2138887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6be07de06bff8a894ca1898d647193653008c9604ba0d99c50fde920cffdcd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P2138891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24216a8043ca4beddd555e23c890959cd0488897c34da8b0325180b9179edbd5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P2138885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c455aae6cf9130e8a89bcb842198f01185b00a0c40b0a1b2f51975f9bc9b8aa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USA2P2138890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e99b281356e0922def82a266db215c55db91e97e48dca272ab0571b8955b4b6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2P2138888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0014ef093cec9e2632cde566a119c34511cfc6ec63154cc1ec5f7115771ee83. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USA2P2138886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdc0e14da267cd378fb7fcaccff20199d22ee11febc47ba35f5c5d709c42fe0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2138889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b181a32b972b2312bd4bb3ff0c7681eb9bbc93d53f8d3148ad0105de4712f71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2138892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292d4f9bfe9302a9552247ba85030fd41ec2114342279f243b8ec33a813e0f61. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CACWV2215624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e32c71fd5a424ebdd7140ff952cf3ccdea9563920b580d228d93cac025d3e91. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA52370871.