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 0xda2d9b1e85a39c800ac759187682202e39cbc29cae324b64023ca0e4d8902fb2. 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/c1432232-d38b-45f4-8f44-b73a3979168c.json and https://artists.proofprofile.net/proofs/artist/c1432232-d38b-45f4-8f44-b73a3979168c.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 0x20d0d1ee2be690bfc11a727377b19324b9a2309d4666d1237c6f15d7e0e8196d. 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/SE6XY2349579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6149cdf18a4b5e90c8a55c9a24c47f545a163c0ef3447823e21b0d95ac05ef2b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZMEN2249761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e85ca3da4397e835a69b7a6f25a8f77c2d0c2ef46418f6bbf69357baf51b9f. 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/QZMEN2249767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fffe24ca7c047c2a0c501ba6b742e34a7c1ad0006a22f0d81478ce5f2c4d0d4. 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/QZHN81945165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6925af0ec61d8859f8acb49f439c1f50c89dd84eaef994bc52da2f68ba2f21aa. 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/QZHN81945166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c58b1f42e9a83dbf27d0879c3e98188d5617f8198eada0634ff50cdb6030665. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHN81945173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea04ce56202e4ccb2faf6d6e6013bc26cffd1cbba19c3085a4e0ac35d394b484. 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/QZHN51954249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb53fa576bec5f8868db23802a9e2f931459d9de21aab0c039ab5e1829589f7. 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/QZFZ31972742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c01029cb2e0c3150db2a1136e4e0ff38f600719bcf327597cc9ea1c72101339. 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/QZFZ31972753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5a4820f515b52210f5d156b1c82e448f824617db1a77e6052befeb873645af. 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/DEAR41931928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe33575e69fba3ebf6695c5bb9d1901b970afaa4d9fb52d58dff002c7f54263a. 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/DEAR41955680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85cbc1081d7024be3309e51a70acca2d54fb04e90227d1fa862e5a141b5a249. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEAR41958694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bbc02677a4d12984d4de0df966fead1f8bd66c23f2372986e1da783a48fc18. 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/DEAR41969143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a713896ff40d0bb27c643afa071f53e8fb565d68721821cf53896371bfb0d13. 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/DEAR41961684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37678d3ec8c787557079a90b54dc8341aa7a1573e721737b92aac5de6c008815. 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/SE5752491265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b2daca336c2d205e54eeb490aeb961d0e16e1732094f0e29c039e900fe8919. 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/SE5BU2428390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae23d358503d300765a3cf3a0854b37d76eb92b3608b79c77d95c9929d880e. 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/SE62M2348510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92257a36ec3cd9f554a7c3d7dbf70ac53e80c62b7bf52154319f8e9f1108318. 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/SE6A92328826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb99c8a921162a579dcbc08c1555ad74d5a482a84be0c0e630b750edece72d33. 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/SE6XX2399673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe84b2171849f7c8264a4ecbbff9e10acbde44e5117dce30cb106d8a66751a60. 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/QZTB72327593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae513a79365d1a1353a4aa589bfcef730d5848cf5c837172305258585210e5e. 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/SE6TI2380379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd02cf00ca052dae3d6f7c513639d67bd98db64b2a713dabcbfda902071a481. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SE6SA2378941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa659e1d6e75326b5e77ae51eff7d44283ee5283643a24ed1b953abf5bc52569a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZPLS2373680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fd7147c81dd5473f1908777fb8a96b36915dff21fe5b7311009f686f47ac3e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SE6SA2360438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc86c2680824aa8bfdc099db097a0c2a47ffbe81eba943c715d4bb7d407e06c6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SE6QE2333071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6a7a2a002833ca50d4e23022ce89a9ebf92b87f49c4c83823d8d4b1467bce9. 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/QZHN62351113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc172406429a3b027dc71840c11507ddbac04d2c8ab8944e9797f63fab4749839. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN72561139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e3beee6b9640f7df4060a8e47a6e099e302b3e999046b34702bbc04862a448. 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/QZTBC2432878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb91b25b6898a1987ee7de43c73ad54bc6c8bb6a8f64b558cfd6f0169af0979. 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/SE6XY2506943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f68ba1426ec5cfd1c53f61d7a0efb5b6166ffefa198a99cb196d3be226b486. 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/NLAM42500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bba483e2bc0af645f6fe31dc207e64817272f1f33733e8ac9a0ccf0fd5ef5b. 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/NLAM42400452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa867d54c158f67fdab49023ebe1f86ce40dda7a4721eb409ca3a7fc2f3babe. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWFU2460762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f4a72a8de3315b117e4162b9bff48f5c277aff74dd5317ab354cf9e9e5f8b. 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/QZWFT2491175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e64a31f34ea7952203e8e7f6a57e264017995853cec5973a500ed8248a45d59. 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/QZNWU2342283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aced1e96affaee0bcbf1030e764ac62e593c017a2c7f471cd0443a78e70b9d. 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/DEAR41843522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecb1889bf48780ab7908c5079576c5710846e47ed915a26c98646c094975ce2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM24S1924024.