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 0xbbae1e33aa797578cafc5aec448b870c267767b6312c8469e6c13296e5b0631d. 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/cfb3c7a8-a26d-4a53-a789-c26259c494fe.json and https://artists.proofprofile.net/proofs/artist/cfb3c7a8-a26d-4a53-a789-c26259c494fe.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 0x9581523eb6beed7e71b064aa26575d622c301aad84e53d35ef215b00583d2c19. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ32280189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664e0eb5daf60acf5aabcfa288a28b61d1b438e17ab27c0373f31e7d3597a2c5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ32215557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f5666568b4f383c8fcd9d4e804d56f6e4f8fcc3cd9784d87b97b07719ae819. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFZ72239150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adcbed2104302c2d1edf4c81fa0a19734b566b38abc95bc8e9e5dbd2017a896. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZES62216401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ee958304a05749da1721c2e1d5e517aa49a156c7f6c4da05b3a4cff89b6271. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES82281605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86b66f83da1ba318a7e09b8f4623247e69ed6db8a9850d0e4956495244e18e8. 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/QZES82243476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f119526b9be4a77d8fb11dcba91a44429dc50d0ac0e11ddf22fa84f4c3e13a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES82242946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115131feef404c07cf7830f90d7dc5ada72bcfd49dbfe08a2b9e6bd89d6654c. 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/QZHN52240296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe0231355f5abc69bf06006c66b2bc8c24baa37ece0458add11ad00983775dc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNC2206047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea55262c5a3f56ad52692465076248936cffc4949194abdf45e32344c3760b1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNC2205657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc357449cdef8c3fa774a89be9e8d05d05e07604b1a789a84d7a70c081ce73947. 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/QZK6N2210558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e0e05ad062f7e1d4a4fa57c08a600c7c1b7d5a5ca42421b6b28a80031e971. 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/QZNWY2207945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b040a1cf69abaa90e8ff8fb5be78b8f27d884324b6b7b1e6bb04dfc5969275. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTAY2263213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5032fee4dd947c8e844afd42c3bdadbf17393968fe5063cdd1e18560b46800. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZTB82201823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876825f33064cd3dd9f4f3cde5ebdfa16fc10d2c01ad776edf76a15a41e3de1e. 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/QZHN62393119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954cb414cd28621d5453e0f9a5e9e9c526fd14eb462b6e4a26bc5267b6647e48. 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/QZK6K2313483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2442eda21ecc8a6027edeaa1962ef810f8d7bd1214b418cefdc1820f9465a6fe. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZMEP2305894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67647922167bd36fdece772665c7d8928ce51d5f0d1f60c9a405c091cfd3cbdd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWV2382470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb043144fc28b682f247003f95b97d6787633f15a5ade00df12854a935fbb720a. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZPLR2312043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791aaa67e2b22b8df8cd02ac77cc15642fe75e2531ad6380e82edbdf35d413b0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZTAS2379020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eefd171d66d73a089dc3d30a608c418aa4d60945aaca326c95b137840f2b4e. 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/QZTB22382094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaff1fdfcbad61e6be1a8f569032ce1c180afec8e4d68590beddff459b339ce8. 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/QZZ972347032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac99a42a2d240d993627fc62b81a54edc154b57e22902cf8ace294782dec043e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTBD2388547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f8c93d6eb1c0d183b394e6989f6542e7761c5654fa73c52875dab2ca3b3a00. 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/QZWFN2348422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e9185875a93ba92359716900736ff69d204266af1605a72cbfefa7514848fa. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZFZ42463498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f6ee53597ee706ef66c5c144671e1a2a60754c0d58389ff9349278ee950c1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZES72481934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc5ebd2aba3066394522eaed66073276e7a4792c16a34cfb5141071c3826ff0. 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/QZHN82470028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8882a3c6483d84230cb79f3700dc908a6396efd38b070679333a6ebb192b4e5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6J2442313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738daa97bb6a2ee2c7d9a942122cef7d27a48ad4ec482f0e9453c0bbd4cc9e91. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWR2492260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab6420ba1f2d324e99531fa8127dfa698c6b91903da26c6ab84ceb89d072fd1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZRP42452346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eaf8dfc3b9f62e23aec2b3959a920de4b10b376c9149917fb05e8e2de5e4b1. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZWFF2419091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0194fcbbeb85cf0f9b3bb92f2b40c701e96de4ebd6d520879193f82c6c088d93. 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/QZWFV2486414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475a704718b68b3c8d135a0059437ea98e829dee497fc8904027e704b91ebf75. 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/QT3F32452574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e25a1e192d635f03ad64dc9cc88562cf482b359d6cd4ff09a70555ee1ce690. 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/QZNWR2222376.