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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 0xd32358c28f72abd32de53cb4679113d16018bf89e0a3d6786bca20d3dbded16a. 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/0e8cb8e4-75ab-45aa-bd5f-b606a4d9d09c.json and https://artists.proofprofile.net/proofs/artist/0e8cb8e4-75ab-45aa-bd5f-b606a4d9d09c.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 0x4e97473bf53ab10de09af5321f09272d5bb4052af87a83ccf80855fa9841b166. 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/USCA28300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419a2219c64a5f760ca4e6b8522bb300d7120129d6dc8c052865cd724e8bb042. 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/USCA28300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca17411d45e94d8e7feb298ca7bde06aeff4d5e2f44a3cdaef29a6ee07e1af8. 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/USCA28300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317341f70941333b954fbad9ee2e696f867a96f1778220c33e6a32dda6c7275d. 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/USCA28800638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1642996f0641e61483ada987f75fa96ed1823b5a07a59d29bbacbd371a3268d1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USCA20000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480c9bcc8da846183bb4c78234f0d376006d60108bfcb216029dbab07b348412. 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/USCA20000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda00a8ed54129364bf384e179bf5b8520670434dd3584d6b8956a61dd95b66c. 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/USCA20000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05cbb6b07820ea7f7fd76947dbcc59ea2d883d426f05ff9672d1cbbcfd55ed4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCA20000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24da478497ca26b83b6cc88889622877e12b20389cb4b4e61fcbb77d42de94a9. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USCA20903476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707b7938c28426320c9e7391c4e7d649d1dc0903f84fac42db276ac6a2a8be88. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USCA20903479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2268b73c50bd789e45ef4765ee95ff5dcfaefb866f249122b5b2f6e50a0a7380. 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/USCA20903480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca14599aba5b173b1564252dcedaaa304bcb70be8d239bdf39ed28d8c6a23d5. 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/USCA30900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d6b5eee11e260fbcf749886842cc31521c846084aa033e370206dca2e1fb5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USCA20903475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b423c7b78625a684e2932a7dc68a4eb40d233c613f08833585905733a9cd8c0. 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/USCA20903486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4277badd5b7d001fc37d692370569dc7d4d74708dc9f442361664e2c733a9a8. 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/USCA20903489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea91050a449417b40aa026a9988b905278d17c98e8d0aede1ff826063be0bf1. 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/USCA20903488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3084d38523f060cc7fa2c13c4e90eed147267bab86fa05a013ce0751e39fc1d0. 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/USCA28400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d288f7d8be6fc5333031fb053e641fdd6b4a18c5033c7bd7342994afea6071a. 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/USCA28400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c552f205758aaa571cc081f8a97a21c529d324a28f9dc71fa0ee88510d26b1. 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/USA371526238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bbc5b6c79092ddfacc4dbdf7e232c8e2a3dcc4acf8c43d98dcb1f5e0cb8d11. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USA371526239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9009806ba332627ae0571f829a9ec0b3ec3addca8733edf45a313577014683. 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/USV351305665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a700c88bd2b07dd22583624f743203414c233ce4fb742cc8f216e3ab9f33540. 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/USV351305676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aef1ecb68afc7037347f457ff4aa53dc705e681d76d939dbd924a9cf69fb10. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USHM91717519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fe4953fc6da446447f119fce467a40f6db2a1a15df568051fbd424f583e62f. 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/CAD280400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2ee1736fc4e65e91b7fa9a7512915464ca745fc5917bcf9166cd625f9030b3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CBCL02300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1cfe68b6b8a2ea076ecbc7cbb48978001579309903a2a01e70019ed56da74d. 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/TCAJM2508109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642a5a7802e2353861a7e9919600de4f2838be35fa4b5e8b8bb31c52dd170cc0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CBFM42500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2f4af66c9c8c4d5978888864191bff1b5b97e34536dca727b98d21c43c9c75. 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/QM7281482230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5709e1024eecdf4a647bb5213ae8296c1185866187a18ca2ac2440768b632d54. 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/USV351310792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a15c05496c44097852e82c17b446fb17b863aa8f293e086e6b43a4fbad8cab. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA371526205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed53af7dba80ef46e21c33171e0460db7675e9e9457abf855ef2e9bb3228960. 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/USA371526227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032f7c09bc02be29b8f2034926c0eb2d28730d69159e952257387f723e7a267c. 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/USA371526194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa26efe913e89db81f3e714e40631c61c372fdbfcc65df15a0604990b4fb99b. 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/USA371526201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0386c0b6596841cc454b653c6d03622a5b75ef71d2a4c3c39072d75e22b5a0. 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/USA371526220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05301b3713a6439d2282020ffb228a5832f11a26cfad0b6dbeea76a646b5d83e. 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/QMFME1305145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec5de0d9b34aeb638b209defd0491bc74a19a09170050b5d9c584a212784ab. 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/QMFME1334564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c552f205758aaa571cc081f8a97a21c529d324a28f9dc71fa0ee88510d26b1. 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/USA371526238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3922f2e31515b2d4d6ca69d050b268723688257c2708c3a7731f201d969143. 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/USCA28400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5c5985b403b67c0cf67b73c1a1b586c7b7042c53b32bc89b4a20207b051fca. 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/USCA28300074.