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 0x7b1c704da0041e8699dc51574f83054c44d82b10f7a3c18d3d68a6c66678144c. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfcebd26-fa47-4d31-a2d5-67b671a58ea0.json and https://artists.proofprofile.net/proofs/artist/cfcebd26-fa47-4d31-a2d5-67b671a58ea0.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 0x6c48d0e588d511908454fc9962cf9a0fa9411af3a7baaebbcc8fbdfb6624be2c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZK6P2586882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9d6ca071e87e03f2b77b913304c80d69122f96b7f61bfdf53c1f9d1f0f4211. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZK6P2586884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d282cb8f6294133cab42b876f3d0a04b8ff2825f2e745307f9bdbd76b7edc8. 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/QZK6P2586885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546be0d0e17c7bdec5f61666ad254c454bef1b23856bc446bceba2b7781ca57c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZK6P2586888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d062bc8eaadea15c0374b78995b8c52c69c6b8887cad13f169d5c9c9cd38ae. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6P2586889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4de5c641fe30030802240653568e42119e2de51b1a7b75961682e421c65229. 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/QZK6P2586891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b56a353f0e9c36ddde34ae72e26276ed56492e90f611ef6a85697b35519276. 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/QZK6N2527564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d7cb61d71e80d2e3a7bd923863e81dbaf31c484a0e5b097462862f0889cd8d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6N2527565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73f8607068adcae86336dfd40fe10eea708c275aeb3e038361fbf34673efc00. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZK6N2527566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daee86a2d56c7ae52f8f4ef1b48df88c5a62e930505e01437adfc430a24c4ea. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6N2527567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2677096e25b6cdbe08520d8b069ce82c79fa66e12474bd2f1ae8035e5dda3a03. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6N2527568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64375d3e0c135829ed9ae0122ffd6d1398a4922bde1feeb4fa26ac29be8fb05. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6N2527569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56057a1fb4688029cb7596ffc15778b9b21d931b5c2b802e79944d76e00c01dc. 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/QZK6N2527570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468b6cb335097cd91196da994ec130cd0252cd47d8d93ad959cfcdcf7a51f68a. 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/QZK6N2527571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d774edeb4e764009f6ccf0c1680f2f02f58f6a52114da1032cb290322ffe3d8. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZK6N2527572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbd87edbb510dc0c60be9f49c32f86777d1c16d9c106ce4e3767ab612d9073b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6N2527573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0646829c8618f2c98a29a393903f2df7613bf7cf27f7bc9115cf4c384323330. 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/QZK6N2568163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fa1171795b61eb4c75671bc71ed25f5ff687c101936109c3e04c109105e206. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QZK6N2568147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fce048003434c8c9dc95bdab4fa3545f46cdfe68c4d6b78e2e8b4679e9c3de2. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZK6N2568164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53765f72dc1c998e38678e3d6a73737022a3bdc82924201c64b0b706523902e5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6N2568171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103e933fe16d411e6563ea6e130d83f609173c4f07cacc5f182d2c555ca91f6e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZK6N2567061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe90a3df2f2888fdc14d0218ae9e7ff4b75f0e28ee1d4aa245d2a0b5414ec63. 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/QZK6N2568167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40ad57b05947c513eff55a4c5b621e5785f6644954dab213f4744b0f4ff28d2. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZK6L2586027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142bbe897c18a20496edc589aada89321777134a7debb44747f5f995c8156a5d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6L2586030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610ff9fa7f9425084612835ab8b66c0ec985fdf389e9331bbd6ecc44b91e781a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6L2586018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c051f0c863af35a9e6b37ea7687388d0e83f28d03fed9caa5f1911960adcc6. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZK6L2586031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f223786ca590dbeae7d8e11a6ff831d44baa538d2bf05e8c05b0a1ead7f376. 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/QZK6L2586029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852dfa28412d0a78eb244a0adc9c75dc2b6a208a4dd932201dff717e5648958f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6L2586026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d962947601e707734ebe6bbe13c6904492fdc10d9941cb3d19530e78bcaac. 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/QZK6L2586020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391f19a241fda5c9d88ec875f00f835f8db9417d59d1f1ec43091718b197f458. 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/QZK6L2586024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13183bb877eb93c9881a96aa378dff500faa7a5b841b58216a7961f3807a38d. 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/QZK6L2584203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ad05c03970504d80b89853cdfe3b9035d4bf18a24b7bde19901733f140448. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6L2586023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c2e5bccd0161b796177319b93c3dc4f8be2715a27a86ae5c79eeb1d67424fb. 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/QZK6L2586032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f000de9e40d0653229fc1bbf231aa36050fa23adf792904177d927298a8c3f3. 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/QZK6L2586034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0baf2c1d33c01c4d6270342dfd3ec31f26a48984f6a85b68340deeec54c4574. 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/QZK6L2586035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a4e05cd41b68c89d81f9dbe8e3b9e6a939c14cf9dedbd428612acb3b3c6c93. 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/QZK6L2586036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d47b73888ae03f2ad12316a2716837fcda9742ae9670179cb2fdd00e3ea7607. 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/QZK6L2586037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b5ded837ffc71b888e3c7c895897b487809686aea6a5467388e115c841ff6e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6L2586039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fea20fe7ec9c5b99f16921d933e2daa26bc2c1cecc83a9333678a4d224cab5. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6L2586040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7920fd064c674bae0101862d22115020fa64b89141afb4f8896b9d8b46310b. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZK6L2586041.