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 0xf876862df5486497093ca805eb1e2bad6f629561242ee82df6773629d3fbd199. 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/d4fe2f5f-ea4a-4184-9e7d-ecd93b91a838.json and https://artists.proofprofile.net/proofs/artist/d4fe2f5f-ea4a-4184-9e7d-ecd93b91a838.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 0xc90b5bd2db79381727d587901f8547c79cc05720cca213199d9c5c20e7b50cab. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:53Z), 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/QZNWZ2005363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70c4a915f59db615ec9d14be803fe2ad7dd77d2707b284aa637fd33db376731. 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/QZNWZ2005364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3091d419750f9196b17f297c0a8c34e4aa5d63bfcde2f0047ceb2ee45ee3ddeb. 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/QZNWZ2005366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57910cd5272aa3fe4e6725db532ef6fb439ac346563245621472ef4af80c693. 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/QZNWZ2005367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132347c16835ac8d62e4bf09d2b6d8f7ea2bd33214f2ac0fbf92e42f1fd7d2f7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWZ2005368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdd9e701d90129f1e9bc0fe5b2048bb83cffe2e58be07f58d676a97d95b3da9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWZ2005369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae527750df20ad5869fb3648d086717b85a9b377cbce72ec1b634b4602a4b097. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZNWZ2005370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42483bd121812a023fe38488ed34e59a7b1c3828076953dc8cae1ab4b98dd218. 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/QZES72150825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dbd7f7b34c456b126b8f8f31b1fd6ad5ecff7a23ce57093fdd6498bfc1d194. 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/QZES72150832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96329a8d1cbfd55fe3075891140eb825f50636d9d9761771793ef1c6086c2af4. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZDA72259414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed4e26902126f268a3ff17cf14db4a455da51f145d1e84006cef2aa42e1eb3f. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:58:12Z), 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/QZDA72259415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9405e2a47805701a12dfe45f138bd1e17e31639d341dba690526d72bd6be04ee. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:50Z), 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/QZDA72259416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35b67577358d0f9cad8326207fc20e04e1056743f3e17824750f16d555efa53. 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/QZDA72259417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9b54cecd38ae49995ae7384365ef30438e21c57c75e84ff69984b6c3317424. 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/QZDA72259418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa19d4b7b02aa7c2ba8ae777ced4a683d9c96a82536cded88f6a94a40a0bc19d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:50:29Z), 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/QZDA72259419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d59f9bff4b1b6643cb12f0121ebfce5e7227c4140d4ffddcc691dbc2146bd4. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:15Z), 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/QZDA72259420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447c4aa02218d1b4e748debc13c8deb86db33bc7871cbf2d8648c4eb1c1fa9e5. 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/QZDA72259421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83d9bba962c6e0c5c1851687927e2d54ea3b1b381494e783b2719b928e52b4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA72259422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd0903bc82682b6cb6999a2fc25a3ba11be6137b85d5ac5107961e4a1882174. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:28Z), 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/QZTAZ2367485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f1e63a928297c618d838d1843ad7e623949c8fd04e1f7fa16b81d2f29d137b. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZTAZ2367486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbba53fd6f3005eace63a917a96b290ddea7c14961cad618d5217d9efd6b2e28. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:25:03Z), 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/QZTAZ2367487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57edfbd2e1a7f25d5e89a09dab8beb135c0f9a64648eebc2eb1b410eb493f31. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAZ2367488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4184db719c2c1820a7e44c0247f597b7780e6d65e4e7b0007620155071c35b3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTAZ2367489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3682ca457452ccfb6a874775875df34e5140f2731d09acfc421f1f243a05449a. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:45:28Z), 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/QZTAZ2367490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bcb8b1538a8348c91b7e46697fe6a0658c0b39a0d2366c0b7f724e90f6b1cb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAZ2367492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5480dd8204e5a3242f3637dadabc91fd5912831c536852d57dda9245bbec4328. 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/QZTAZ2367493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6984d38cfb6e8dcb2d6078aec333a4e43b07988178f711d71263188f50de20. 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/QZNWZ2403941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd16f8843da59d3098747f7c992fec8f5b86e15e3fcf7bfa253b1b763627a56e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:47:54Z), 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/QZNWZ2403942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b847b1ed6f43efd3a0d04ef81d1efb8d1df46856595dac7a0069c69b765ad2d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:33:42Z), 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/QZNWZ2403945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9541c01211fc5fdbd8d527d49b46984165ea50f66b762c9aee1e5b591d4c5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:58Z), 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/QZTBA2489884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8d8a90c57eacd7d1a27c12279f4a97d6b2990c652e240b2b01595e3013e852. 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/QZTBA2489886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900ce38bd1b30a479837b83e6581b31ef42b6e7e780ce1f0add6884054a2a390. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTBA2489887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c866716cd5dbfffc547cbae3a401a3976e08536b97df6d3edeb376b707221a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:29:25Z), 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/QZTBA2489888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d1027dcefcd0fe1679ba8dd876afed57c4c901d1d5727871f74c2ad1afc6e9. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:18Z), 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/QZTBA2489889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc0df4d938bbd116419723ce7196f8078f1d24baf698c93944ceb140c2493ef. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:28Z), 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/QZTBA2489891.