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 0x804db040a3cb848fa4eb29c7f3377779a1922c1386148b8f98a7f8282f8502b9. 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/852df1dc-4420-4660-a536-7eed87e5e564.json and https://artists.proofprofile.net/proofs/artist/852df1dc-4420-4660-a536-7eed87e5e564.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 0x79e22e310db8f43e6a4e599bf1f00fb120109f658c082ac6743882968eb60827. 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/QZTB32228014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920035eceed015b1043e7abbf25ae7eda9ecf513bd1023858072f68823d4c47d. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:09Z), 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/QZTB62232530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1fb0b425daf5a3006df8cd7fdc8470ef3f9b4e3cb098423a4a66aaffdf88f3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTB32277395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9553f5a5baac74105f37669f6413d4a6f36f6ebed148d95b2b1a09c51b4a35. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZTB62264905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b148663832822620b9c7dc0bdf3c6e6204789bf1e0ac4da7a2c72d7711e7d3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTB82210820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0668bd08f20c854b2e83efdeba4591ecc75099d8a9ce44a9161b6d4e60b5cca1. 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/QZTB92247750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb4a0162a51a10e9927f8f00d92ef413b1742399c812f2b406c2028315050af. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:21Z), 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/QZFZ62381899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b44d0097c5b6ee5c9fba3911f478394c9b68420c9cece77a6f04f432eb0876. 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/QZFZ62384767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fbaf0b75d81199b92952f6ee1c4025c6da7850e556691cef19140be7e58cd8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZFZ62384768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fdd12a5f1232fd99a782abbe289070b668ef7fcc6e136eef2c801c39cbdb93. 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/QZFZ62380934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817a94b19d9a3a3eebe1ab168fcce21b6091820303c11737641c60b24589adcd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ62384769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcfa1a487b901abf8b97e692cb023a3babd27b3a284233d3c06a52d8f1ec5d9. 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/QZFZ62381898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365537d22c12fb5c95634b513672cb94531743982f38e8bb7ac9c19decf7d783. 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/QZFZ62384770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ab237f8b7e52593c5ae3c65aa37eeafc5b7ea9e87b2df5fd2b1e9be56f581c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ62384771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170fc7e6ef6a9a3d512316ae1172f9a4096f88799d529e7fbb51a83fc68be973. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZK6J2382520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fdb03d2794f04f59593fdb1ac41909e86c88e16415c957c5d970f8dcf07a11. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:01Z), 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/QZES62418716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a178f894aa8487130aba991b72a463bb9dd2b2330e3103616885cb7f91781. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHN62463809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45089febc7969cc9727d96fd222fd61224d23ce1ebfd1094a9239b021e8eb12f. 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/QZHN62463807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635d930b9a3325c3f4c2945a3dd55f317923fe5d21879cdb7daaa9189a920a4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6J2473283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55c96b5e426e36b34debcc9da60bf65b685d9841986ba017920f32fd312932f. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZK6J2473284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc732e78cdf960b1b63746892392f617445343c9158782359df40fc24a0c11bb1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6J2473285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d879edc5f8e12d55d7a69cb1dc6c86ccb429382fd1b859aa954114400a0b93. 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/QZNWS2486012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1388d701db78467b29e2bbc228b3ac5a371d9df9431b31d9ae6e15f8d41a60. 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/QZFYZ2564223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338a6b2d90fe65aedbf57590437f3cbe2ca1324e5d1a921d9d90f10ad404df88. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:02:45Z), 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/QZZ7T2405481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dea9dd6ad76cbea043af640d2c555be92626a925ddae86a3ac73b7a55418d8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZFZ62563900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d275a4a3d20f7af5470f7dab14769201de3f10bf25b9e103ba4a9d0207c6e8. 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/QZK6N2547612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7ad920fb3b2be4bfe6a4005b6c2be702d4b56cb9c074ad5843af1e0079862d. 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/QZK6N2547616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d275a4a3d20f7af5470f7dab14769201de3f10bf25b9e103ba4a9d0207c6e8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6N2547612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e286148bba62d07cf041c23516bc21bc6dcf6e0fb797cdf0675d6c80b9334f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:12Z), 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/QZK6N2547618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f912bc1b72e90eac960c56d420ca155bbccb1f48400dc42eee10dc567e22ed2. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZK6N2547619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ca79b781b1a6b1c12c0a6bd08e33a7975220e5eed4f3500fa9bf3c29fde9d1. 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/QZK6N2551304.