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 0xa2ab591c105df22f4ba4818763f14222efad8a2e4978a962b92206b78febf539. 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/f675faec-811e-4fb4-9a6d-64dfccce472a.json and https://artists.proofprofile.net/proofs/artist/f675faec-811e-4fb4-9a6d-64dfccce472a.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 0x0bb4c6c345b007d3f7657db02bc6fd640b8e78c9e98bc1a563a8038509323746. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CZA110107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df7a99f484beebaf958910f4966cc62801bc99e2b68471fcb886b76bd93b30f. 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/CZA110107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc8a608d7c77bdeb36b3cbe1123966321d729e72adfc6bfb5a31ee098df2e63. 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/CZA110107005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75f9de96be367f302f6a270596141cc9383bc89197144a05cea2038bd37a38a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CZA110107010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0c1331deb7441f08411ec69ea5ad99a1ac999dce7065e9482db7e986aa9394. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CZA110107011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3358e9cc237cb3608472d15885b394e7c2bc205f83e09829bf90eeb94b4595. 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/CZA110107013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db81b3e1447d42e97ba93182a92fe39b40983524c131fa8257f7c1c03faaf9d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZA110208014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f18d807b76de900d9861beaa19face7713f5ccb99c96c9d8b11c050fd2561d. 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/CZA110208005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b54344d20822d671adb78eaf5a12cef065e4fbd821259ab3abebd583c14f9b0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CZA110208003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f76927dc1ef50d6072db82a34269c32f027b1af7c53792c775627d36d12e1. 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/CZA110208011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f62db4f5fb899f2d7e04e0a079aaba594497c91344bd1c7133779b5948645f8. 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/CZA110400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fea32148acd7febd5d9e5ba089bcb302f976b8ddebb9e7fa284eb77be91078. 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/CZA110400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57873708421dbf4f44191d0e17f5e668bbec89c16422fb94ea86428fa932455a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CZA110400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fadd28a8d844cbb8ea86430be0ad389ecb8164719bee8da7331d95176d22a9f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CZUM70600148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595a200bbde3566a32706d95767c0d6fd15cb82d82c46ee87603d4ee94fb82b9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CZUM70600196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5144b3cc9cabd1bf002ab4eb5a3a2f1b5b47487444a572cca6f9e2556e0ca211. 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/CZE990900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe770c4ed1c39867aff96675bda8b099995e3ebe763e1d3bb1bb16e114928a4d0. 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/CZE990900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c10def841e8b6d0b75923c0efe5659bfd01911b525be5038f0a1b0114bfcba. 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/CZE990900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905afbb437e193f4d58e18f0fcd140e54074d628f688b18c001282d46c590109. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/CZE990900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b2aebadff66d980d6ad9975f08b999e98f318cddcea12c9d9c4d1c7a5b202. 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/CZJ851400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff063cb779276b95bf0fa6682fc3d9d0c3074a017bf6f1e99cc795ad0bb2e04f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CZJ851400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e79fa772ddec24963d09b8cd7d8d5ca8ca3c7f287633df92b94d944cb281b2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CZJ851400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46123e5d70b05ec7d23239f7e3d146006e368b0c1888485bc7e47facccde4d5. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CZJ851400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6440386270e1f889d00fb0c7c95095e7ab2e90ca75e8df3cc4ddb5934dd366d7. 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/CZJ851400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c8741da1e83e3867d3b703d7ea543b1678524d526d8569d46396e4a0aca46b. 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/CZUM71900216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934140e7b46dadffd8b08f4bc5a1c9e14fd1b51f6692aced7dacef20ccb67479. 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/CZUM72000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ffc9734f79c79bf3750ab9fe9ff396bdea4654075b95daa1bdae3f964ce46d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CZA110107001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb4c6c345b007d3f7657db02bc6fd640b8e78c9e98bc1a563a8038509323746. 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/CZA110107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198058487d408cf413dba61f8cc824b047c97d0c36e42d2bf414660dae5babf2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CZA110400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b770fe4ce5add06e2aa004246d29b161eb691888aae63a8706dee67d31c29db. 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/CZA110107003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01511367a71a7f6e61f14102f8aa7f2bc0df85e38511862ea0280c6d8cc8656. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CZA110107007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df7a99f484beebaf958910f4966cc62801bc99e2b68471fcb886b76bd93b30f. 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/CZA110107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c35d3769d45f390391f824c96ae448cb05464cef3697fe232baa7822fd306a9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CZA110208001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc411f278ab376b6026397b5a4c8b323dad10027422f477a75e49fbf620bae21b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/CZA110208004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b54344d20822d671adb78eaf5a12cef065e4fbd821259ab3abebd583c14f9b0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CZA110208003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2e55fbe775a3e9e76757a26b880c70812449d1c3ad7ac0872f83e7a8806510. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CZJ851300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c831282f64191a93d304e88d4bc0bbd526a8d7f4e8d32cf3b9303d2e13d4932. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CZA110208008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4048261b97ceb74e964a6e4de59ded2fddd46fd10fb46a4ff47505448d8a191c. 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/CZUM72100574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dc65e44f5ad929f455e908f16cafdf160549d0a160d1a2821846b0aeefbdce. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CZUM72100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934140e7b46dadffd8b08f4bc5a1c9e14fd1b51f6692aced7dacef20ccb67479. 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/CZUM72000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5758d1090320f9d3a5bd1b92dabda62b617f0769980335e2664dbbb13aac348. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/CZUM72100577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d8d82b3a0a50ddc93285eaf57217a417e34d4bc9ad4398e9e4a95fb5b572b5. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/CZUM72100579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42432698571abe0bde27534b57f226fd3f5cccf42e243d80d84abfb428a7d1b. 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/CZUM72100580.