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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31adb07f0a1d5f69761d21af3e62a5108248e985365f35632ac6b28a6d34302. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4fde5f3-1255-4104-961f-46b0845e2790.json and https://artists.proofprofile.net/proofs/artist/b4fde5f3-1255-4104-961f-46b0845e2790.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6211022d125e31c50edbdb8c47b0b5b8be4bb6e7ec397f0136625a774c7210a9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:25Z), 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/QZTB32332504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975dd98a175f92e4385223bd3ca5ca72d0bc2402dd73e0ebaa4bf1dac7025bb5. 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/QZTB32332505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6639a473ceb6ccead7641915fd2d7d7c3dcd7c1295fc9ddd2c0699ebe7af67de. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZTB32332506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0186626619357133a92a66d092a6e9fd4ca03b1c3d503c90ca7398294ed653e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB32332508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb666d933e64b316fc91f807abcd1fb3640f909bcd8cd37a01e6079191391b1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB42328844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cd7ff94b5cbf43304d989e34e430c344e3897e63295d8978897d41ae67314c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:42Z), 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/QZTB72304854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3745dcebe246bb04812c9577246fadf2d0c59af4d2c89e249d41a36bb061f0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB72304855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed86e587dca597919abbec67e2bbd279f1f45308aa91747f7f93981fb7fdcdd. 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/QZWFM2377367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bddfd6eff6c784c9ded0099f7239c698e54236f0635735a5ffc9b0e0850e693. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFM2377368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7c013bbc558dacaa2ac5101293be1d4e3723c2815c9b021f90bae0ad1f2efd. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:02:29Z), 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/QZWFM2377369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227e54380f6e99e9848bf2a82fb7a5e101459177a97fa1d22f197ffe678f9120. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYZ2565389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5f8a18b288e56d50eaf03cb42e7fa4b1bd80c5103746e45e8b3d418f25e080. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYZ2565390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8432a3f85436b20b81e7f4b8c30f72ee43943e35ae7b366c60d817e9b97d94. 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/QZFYZ2565391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cef88c7e3f40ee1ed4e626da6e158284a24460561a29c34ba2955a0f7e0eab. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZFYZ2565392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6afa9d760f2e9a240b316fc738cb1e0fd17c101109be8b9d01d954f5f9fbd99. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:48Z), 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/QZFYZ2565393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6996e402794f4aefd595530dbf195388443279661b19ab0e6e9e3f7203b58e21. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFYZ2565394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad637cc19875585dca1dd74172b70ce4ed30ec2018a0ab1ecd44924437719fd1. 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/QZFYZ2565395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9ef16709cd3af1744297363e19b62975223d0c9d7b8b47d7d22d8216ac204d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2565396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0655b453bf3f227fa0d9dbf212c7f622d69c97b310e83c855b3a43fb8e858ee. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFYZ2565397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e5350a2f75fb375eb77f15f8ec36f3ac07ffd8c0a184f06870b224ad538373. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:09Z), 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/QZFYZ2565398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abcfb207215af77aa00fe08f72f7e02dd5b004143478a74ad9a0bfec94a43f5. 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/QZFYZ2565399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e80fe29d155160f9d7c785e087aed72331e27179664078a9f9ac064767440a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYZ2565400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ed84d3e0c1b359af2ee546c7f07974522d9a0d70de0301f057bda7af15ad32. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:54Z), 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/QZFYZ2565401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef01156629b9e7058a073e80d14d743eb02beeb5ed1f2819582addeb71b98100. 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/QZFYZ2565402.