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 0x33398df19e623e6f51eb17365705a0032d38a7074645cc386fe71b0c2407688b. 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/9ca316d6-b23c-42bf-8994-26e193449632.json and https://artists.proofprofile.net/proofs/artist/9ca316d6-b23c-42bf-8994-26e193449632.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 0x17b15091420a7eb6e8ed0d1c46d4113f5dccdfaeeee759faef343f30790f282a. 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/SEYOK1711264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f59a1b12b47ffcad5082ace2054eb8a271039bc32ef810582fb7a6ee09f9fb. 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/CAHQJ1820308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dbc8df9cd0479164a2cd1fec796cd4da0da9db679a0ed3662b011a1170e51c. 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/QZ9452200988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2887a779b42fe68a2a9aacedc150fc6481947dabb1e67df7ed6cc4a1f9d6e3b. 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/QZ9452200989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e9fa6f09c310ffc76d8a703844d7aed509394dee6e5a27ed548a3d8ca9e39. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZ9452200990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85512f7abbc7b5b7912ab1eae514e1d51d5e8966e9ba319b1252fbea95074f51. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZ9452200992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb9003c02dd8a9b1cc00833e5567f14c9b5df306e8691424963b47e571051e7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZ9452200994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7759accc348c9e2db3c470fb61a3ec01d7a5369e3b8de9d8e81f88dc0a68ce5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZ9452200996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821850f803527ea572614e4842221ceb6810465971f38c09f2afeabb1c42ce7f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZ9452300884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc184aa8b84dcf01ae14b380d9819e02d73e9996a3dca51c66d349e648ea5988e. 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/QZ9452300977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea5fadf6ac5f392d3573ecbf26c0101b7bab0a3b6f3aad317b3c49e44a7243. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZ9452300976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f74426b6bdacacaa8bffd65506fbfa4d750ae7cde5b7efe087d19a2806ddc2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ9452300975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a86f697e6bc4cb5fe4c4510355e58619b1f33ab9b8defa0f3044078ae2b7018. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ9452300974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5da6b0066597abbc2d245edf989642ac940db5f48959e9a7ba563625796df1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ9452300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564873f47e0987efee14824e24265e932920cf2f12bc1e90c49b1b7829b15c58. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZ9452300972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529af16fb95ed1e9c84a5349cbb4e09aead8dbbf7eee647d2b910554252826ab. 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/QZ9452300971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02583f3579388854f9d0b899f0a3af42bbad03defbe8a5b5bd7164e1d3a3815. 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/QZ9452300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658a6eed91dd70e03aec2a542521ff506b510ccfbe1dcef7ea8742b1b91a25b. 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/QZ9452300969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951845c67213e0c52f653fd2a9155723b3f1677abdae6ef0618739569d1132e. 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/QZ9452300968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743c798a3e730c4d428fe616c2c683c6b30a2d1ae116a4e6f218e91bbeb1c5fb. 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/QZ9452300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e790f5b631e4289c7caa98737011c68372ce05d238229bd500190b69146cab. 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/QZ9452300965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafa5b417d1a3c53a35592142389419e59e2eab1ca97a4c3ea56845858b3b9f0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ9452300964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3404d6d2855945036f663eacbe81806eb61bef5c426b43eb7ea8475e4d00a4d8. 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/QZ9452300963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380f9765e0d0a9176b26c64013d3f77da2a8fec597babeb76696e716a1051c1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ9452300962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6a0594efd81a0f7372c8ddc38b4fa980ca892e2c94373db07371b033638d35. 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/QZ9452300961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169cc9957b1d48510beb0159d3941aca80405dc7bf5cc0e4b5e0360537c2c43b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ9452300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88dfab25198b0d0742a3ebffbeb5cd5f2b1ec2c70e5b68e002fb3ab078d737e. 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/QZ9452300996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9b2f5e38b117c9057949d0c56900dc39cce78d79f25d0f1c01b92c9396abcb. 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/QZ9452300998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6adf034633dd1c639369240719cd58f6c005d6ab2e17c2c92ab86082bbf1aec. 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/QZ9452301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9369b536b37d314cd04142c28d70d752b72729c320ef69ef1f9af70300b58ecb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ9452301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d35a50818ca2779aba4161ea4d1075562979294cb764576294c1571ec9e90a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZ9452301006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f43ee9fed5d5b99dbc48f0bcabfb6c61b839c141ab4f918d60cdd2003ef18d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZ9452301008.