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 0x2c8c517cde4dbcc54310f083c0761dc7ef7013f45dadabbf00fadea808c63b2d. 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/f0ee5bdf-2640-418e-8c7c-e44d0e84ce5a.json and https://artists.proofprofile.net/proofs/artist/f0ee5bdf-2640-418e-8c7c-e44d0e84ce5a.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 0x1159476d297f19c6cc5c373f248ba6801beb5f5fee265c00a22e675a785e923b. 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/FRUM72000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0f88fd92f3b3cd24f2fe7f4f08442e68176498a6d3dba9234f8c8e9940b637. 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/FR9W12009240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebce62eda72866d5e54e491337deee86844ee0768e64a41fd8ffce936bc3fb9. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR9W12013794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1159476d297f19c6cc5c373f248ba6801beb5f5fee265c00a22e675a785e923b. 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/FRUM72000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3a82deae030068405594c22114a3fdc16c7bb9d871ea8457c8b339526d0eca. 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/FR9W12013796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01993574d9106ab313675ef6c59c6d07d578d74149ff4dcf387dafc9d863db93. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR9W12107752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3431197aa5475edb1baf9d196e7f471b3377e62551a0b88cbd834d2088fb5579. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/FR9W12117458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0c30d28f918cc2c94632d4ab232e9f9e54f6c1c132137a49f2533d8829aaf7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR9W12110880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebce62eda72866d5e54e491337deee86844ee0768e64a41fd8ffce936bc3fb9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR9W12013794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9858bb047c65dfd87cee7183fa78e70796095f4c1b94bc33fa956012ce66f03c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FR9W12012853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f91d721fbd6bc5e89e25d9a943cb2ab68266dffe92225458151cab259daa5. 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/FR9W12023525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e76766988ae6e3daf38c03076960edc0ee660d3347e11a8afe06116255d161. 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/FR9W12030448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3431197aa5475edb1baf9d196e7f471b3377e62551a0b88cbd834d2088fb5579. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR9W12117458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34c71abf2b8bb5d697c4ccc4edd4b64edf41671423fe71aa45a287064393f10. 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/NL4NL2220551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d2c87d0e52a33945f2af1a9aad3d2ef98f5f6da6b81122ea0484475a2f9c1. 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/NL4NL2220552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf897b98856bd322e9b1f496ac52a7d7f6a6c6a0f602caa4e23de6cade4690278. 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/NL4NL2220563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6aa65145c410874ad72f335fca877cdcca383db0dc4dde5586d972752a9580. 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/FR9W12234283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc461b5be72a4cb8ac0982e346bdb37ae4cfd6c24aaf955055773f8d0dcece4ce. 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/FR9W12239095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920c233b65f97f691575f7b80193cabd9631d28eeaca9c26c6cf52dd61c76ba. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR9W12309823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29a81e79c947b105e586041fc7711fa3e91a4a7cedc4faed57b3f4475a1861. 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/FR9W12364046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a0a2aa89de9a3b181af408b513189d49530d77f9aff2a55a1a474dccef5572. 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/FR9W12431758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89319ec37d5944d9bd616f38e0e0e2fd866f6a5673e423a415159f03a7d2d4e9. 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/FR9W12431752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5479327bf273c2e970a315f5ab2619e32ba22ad60fcff8dc93f39d2d8639ed. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12319335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6870bff521a486b5e4f201d6846f49c56889371fe1aa3242b05d061f804ed2cb. 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/FR9W12431753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac50389b032d4eeca9ef702e49a914f9481d293618c8368c192e02323e4715. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12408974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29a81e79c947b105e586041fc7711fa3e91a4a7cedc4faed57b3f4475a1861. 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/FR9W12364046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c8c12eaa16374b3dff912f78c0f109be4716b9119b1a901100da28f07323ce. 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/FR9W12431754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac50dc3b988c62c246fb73fda07b3c7b62de3a49822025fe8b2463cf965fe392. 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/FR9W12431755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31426614ca3dba1258a2082598e36b5aefefd17a32b7c67b17db595cf5153c30. 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/FR9W12431756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda66cbf0091b3239e7d85f4c0692d608a06d1bbf4b5556ec2e5b68ca68fa212a. 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/FR9W12431757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd6b9e56ae1c418f6d17b46023514131641bffd6d8e664823117342cc104b5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12430339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a0a2aa89de9a3b181af408b513189d49530d77f9aff2a55a1a474dccef5572. 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/FR9W12431758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823fb49167e366a966e278d990eca540870fb50bec28e60cbf5f2bd0267a303e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR9W12431759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323d521843688729e50238ea51aacdb40124001a5fdb2e24697e3a74fdc4fc3a. 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/FR9W12431760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aa632fb023986d1bd30289effd05ec4d940f364b8cdce28365f5adb029d9f1. 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/FR9W12364027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02870ce5001c19133d9baaade997fd75020baf7e1cc23d16bdfb0d61e9d9327. 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/FR9W12028058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21aa632fb023986d1bd30289effd05ec4d940f364b8cdce28365f5adb029d9f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12364027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdc5533a599b2d0f449e601eac4df28b94e8f879977a41daf0a7e67a9ff0a8b. 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/FR9W12245767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d900475151fcd27effaa89e3ea8a9026754ba384193cbeff03ab2aed915d9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FR9W12351109.