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 0xfc398c303f2046ae100467c586e3cf43b6d1fb85d7317cbbcb7b5ee5a2ad9803. 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/23d3dcbb-aa18-4109-b88e-ab93b301673b.json and https://artists.proofprofile.net/proofs/artist/23d3dcbb-aa18-4109-b88e-ab93b301673b.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 0xad1a2dda1b0fc0825ec5dba2881969ac97bd77bbd883c5057c694f7e924758fa. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/BKW4W2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601ed60ac0412c03d294829621a75624e1f33f1a72e8509a74ef3e2ca8f20130. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BKW4W2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d51701464964d44d32fd3c8cedc1e7a75785de144fe6d7e539c349f5eabcf. 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/BKW4W2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b0768fcfcf41fd10b277bb951727d5d1b0f2d6d5681cbf4da41675ac90c87. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BKW4W2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb35a0f643a1d4532ac4e98940ccee67833e25113419bc80578cf2dc83f12aa. 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/BKW4W2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d435021d0a2e158f31f1f361c3fab42a1c20e0117911dd9375e3105fdd458. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BKW4W2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fca73094e07d01efb0903a4f38ddb4366dcffdf2e74f5f237321bed9350f87. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:26Z), 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/BKW4W2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d6846aaaffc6dae0271ac250fb731b55c9e42f5cdcd8d444bfdb3d98b340f0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BKW4W2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e7381080e154b8f1006fd3046586945ef3d7862b018f2882261b05e7dd4f80. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BKW4W2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fd8022f26ace3017a6439eded8a27d4677b1c6015f3da18547eeb0f7e6909d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:18Z), 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/BKW4W2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea8599ff3bbce63414e4a737b08c8afaa994aeae2662a09d32aca4d5477f852. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:29Z), 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/BKW4W2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0714edc855b4dad5a1e41c14de1035b15fa6ea4c251f4dcd353490eb0e6089a8. 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/BKW4W2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c989c101b14f1aadc468833cc224550f07a9eeae882d816964e3af909f62bd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BKW4W2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc8123bb6c76708e81cd459f6770575a8b349fa794df305fb79e38733198cdb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BKW4W2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd914e9bbde5b6970cdd5e02032dca19795294ca0f83b3038f419ea551a2154. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:18Z), 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/BKW4W2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d041c59e9cdb6e7c863d4936058a6bd2d5075a8f04f25521ca0594d2078c35. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/BKW4W2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71f0ca65200fbb706d50a916db759a9ae4563c4fb6833de48ba4fa3f673e3b. 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/BKW4W2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dd738e644765afb807cef0adf7921c6ec6321292fb6770142abe7d06f88c70. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BKW4W2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9747998b94a621fdea8a402561542a8be5d249fb164ba315ff4d9a9173d55e. 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/BKW4W2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83b0240799b7cca70c83d951d04be60707a6dd0ce06d7002fdaad0271c29c6d. 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/BKW4W2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397efd42bfdf38cd943f9febc323a1d3c20c19251cc114e9eba41f3532144658. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BKW4W2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd3a7af4f103475a81ee5d909fbf0d1f9d61db6d06553bf762cdc3de39cb752. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BKW4W2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a0d79d0e9536f188235aedb32709045de24e538eaf7531a7b57d95cda9a22e. 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/BKW4W2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c6efbfab7f149da0e54e7c007495f4b3756f0bcf4439d3f05bdad7f1ecf806. 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/BKW4W2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e79c93755c20ce9e994a66a74baacd2851e4ee9c19dd76060bd814a85a8b33. 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/BKW4W2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586e8ebbbdc2c1b4797bf52da5cbb653a417d71d18606ca5811ca36743f3cd0. 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/BKW4W2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2e92205cb50443b0e14c4c345d92779c6664f0d81d8ce5d780bfc25df9d79. 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/BKW4W2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3997afd2bd6b01bb83172d5f02a395f06d7d0db653873cf03711e6e61e8cdb. 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/BKW4W2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709667604067971ab62621b8446c405670c678522eab52031d7c12d15de691a9. 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/BKW4W2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676755a67cbcf09bed161fe651cf38cb1e49fa79ad45527c7f5d8c9e3cd8554a. 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/BKW4W2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a79423a76731844aad072c64ac4f8f59c6a6e316505437050dcdaea876de4. 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/BKW4W2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5143ce824f393b72efb8ecd36fc67647162456c51f46d8e1fd04e836b290e603. 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/BKW4W2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21df6f13b8384724b68327986741eebbf7a76e2ef9ecc5f98e9cb97774efd0f5. 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/BKW4W2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b360a960baf982f67813ab4f99d5ddf6d24e7fc1f35e78848c66ef38868b45e. 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/BKW4W2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d24f2c914baa8c5c667fac20ceb94707e225cea575b00ba7954c69c6e1e755. 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/BKW4W2400024.