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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebf572dd5272bc6584e2c0df8d709784238a03b54b45f229cbef91cc5bb84a7. 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/2cfdfa7b-e615-4bb8-a3e8-54ed97230b5d.json and https://artists.proofprofile.net/proofs/artist/2cfdfa7b-e615-4bb8-a3e8-54ed97230b5d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5467019d9b99f44d2ba01580465d119763d98aeb48afa962d4e6f5d32b9754d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ72341871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67ed479d6bd1d87b97952a59b9b9350a5420af52f1acbe91c2f139cd5de9531. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/AR5UH2400791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf520a88daea77f9af3040795106a6afb6476357c1745a5a7d585b7f042fa4d40. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/AR5UH2400793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c95dcbe0ef55372410ff063104f672374cba10aaa44493c56c65c86730be23c. 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/AR5UH2402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a841a038f3b96b3416c3fd3fcee64f4188bcf0e18c9daed1ecb0a26b589d178. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:11:42Z), 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/AR5UH2402021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00b903499ee6cf487f47028bc68b90576c656c1fcb8c9fc0cc7f7fc37ac1516. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/AR5UH2402022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f813867a86b7f9fdd84f77b849505790c399a98b684a34907d297a10693de7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AR5UH2402023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b32dac4f9789763698a8cb2e4d2b1257e2eba3d3aab9cd83f32b9fe55ceb71. 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/AR5UH2402024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa27d3fa932b888e4f23f616785099064dc9e1a3e5d003d4c94ca96cd037c523. 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/AR5UH2402025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bdca00c51992367aab69f5eff5006ea7027203b56c6f0b4f09594d2586ff4d. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/AR5UH2402026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a2fefdeb8cac5dbe0ad3d6dfce4c7fda3dfbdc013e253684fb8c404022467a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/AR5UH2402027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b228c40e5cabb2126d0f22c9549b33bdb5b7215c9824aeef054c3d0b19d2da. 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/AR5UH2402028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beef3517877355661ce9c76a7b3be5a66604406f9efd349393d71b59175f257. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2316753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69e18a5f9d236467e5f5a4eea5d06a3e29da943d68901fe37dd080c16eb6b5e. 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/ES71G2222401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8875ec4838c2b99472f72744f88f0ba1c14cd2ba088c281930f253a46f2783f. 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/ES71G2222404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ebb6bda2fdf6841e8a9313084902e77f5fc5ee1622a6d28b3ab28f8907a1a0. 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/ES71G2222407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd21ed606b47bd148526062ac178a74334fc99bedcf4b8e8927b3ef5f0c5b867. 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/ES71G2222412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7358123c60a56cf55810eaf0fd9b97abdb13c55ec8f358acee2cc878ed2cb3a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2424922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bafb32dcf17add2506a641903ec4eb134643adf09bc93daf07e50f445c4e8f0. 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/ES71G2424923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faecd6417ab5b2707ffde5346a8da6230c75593d862a6777c9350d9691c72a1. 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/ES71G2424931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d10d0adeee98b2f114e13a846bc82e6cb6936ced6c33f1f21face2885012360. 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/ES71G2424933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ec3c990454bffe5d38ee72a91df3a79ddd61e6de89e5b1dbe2bf3c2a43ff84. 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/ES71G2429340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26812e251850ccc55f241888bde0ea3719fb1568714f751b41219ab80a1dfcb2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P42598111.