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 0x98575e547ba4b5ce238349913bd2d910e494ae35d0f82f2d440c83595daa0703. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29381259-d5c6-40f1-a569-1ad7125c8812.json and https://artists.proofprofile.net/proofs/artist/29381259-d5c6-40f1-a569-1ad7125c8812.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 0xdc9df748cae1cbaee7d96b46254d5f21150307dee4db63d0a259620d1655a8ee. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN72272083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598570f2b7e975087ea23b2036d04b6a5fa5d12b51db86ce7090e84390d4cde2. 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/USANG2258211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be96caefce1cbf5a6ba4616a1329245f8028f9e34637202531472c97a848cd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM3DF2251767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd603d3305ef7ed2e5366be9f5e63399479c0b5625b9afe4bf74445d8ae502. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKZGC2309660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a3589025ac25d321b5bd7a14d05dd35918602dc9a5e5f75e8d44fa12b855dd. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:32:38Z), 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/US3DF2493430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e3ec4cdcde4f68e6a0f72a0cdb43cdfae1149d151b4f577d969aca50354147. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US3DF2493431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66700d940ea63d1e80274092343692ae762164a429453e5f08d1fd65b542a4f. 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/UKZGC2407500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde86995df502f38f536c16a0c679d529cb41ea90e5ba5e20d27ebb21c33a5d6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF2493432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088f6258fe32ea563b6d03f2e5f149714ba9aecca089c08a251f13d587a6ca4f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/UKZGC2409626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec959aab0eb9e47724b98ab53c0943706db0054feb3a10f680556b1e557d52b. 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/UKZGC2411309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530d4ae39f0a08f55f41998d44cf3d3a20317e453799d5dc4a592849eaf8b83. 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/UKZGC2411140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adf7644d614da69eae71f15d72e8b732db008434d692c7b05afc6676ce73d55. 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/UKZGC2411273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec5b858e492e5fc864bc7aeab8afb85a50e81ac5ce605511ac21f1516cfc46. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/UKZGC2500887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547614b63a13bb5ac86b6ca2a1c06b843be15488b71af8d4a3baa1b3cd48039b. 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/UKZGC2501013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b566149dbd8e0c60b9296192e60e2a12e40711bb3b1406d81821850d25b9230. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKZGC2501051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cbd5dae72e69089b695683e1bc394a240503bab6d30ee2a2d5c1cfa91396e9. 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/UKZGC2501895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc33011be56565e7a21c289dfe5f5a5f9b3b663d8f56822a996077eb9b1f1638. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:12Z), 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/UKZGC2502677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2108768902fe42c8a6fbf2f3397642bd1e1797b063f610b7921d4d97cac2ae11. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKZGC2503458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12735b69f9bfa5e538c7fd4e1c2d76955bcfbf466491c3b6c64d6bc400a15291. 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/UKZGC2503906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e1f8f1c1a341e02952446e0e6e51e3d98997e0d4ef7420672f08d632e310c. 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/UKZGC2506393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94832a9a992191210824efdb4c8518e5415cb8055640ae5ceddd6cfdaceda48f. 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/UKZGC2408488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc467f88977cf1d2fc5d430da19ef751b1db6da41b59f37e31bad0a5995cafa74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZGC2404364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b23eb25f5eefa584621abdba7bf3b41aafe1e7ebf16191c807aa1b63f336b9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2068336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388c79ea6f0565823f7c96db86ab364049c7a8a17bddd0abd322f6766b44db42. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2417645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8803b32072fdc8aec12012e444de4c80210c688c40ee5198c27e531ab197d4a0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/UKZGC2407499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66700d940ea63d1e80274092343692ae762164a429453e5f08d1fd65b542a4f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKZGC2407500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4550b117abc6abf5273227b384951e7660fc3efc6dbecda1c9c3a73342de38. 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/UKZGC2406162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94832a9a992191210824efdb4c8518e5415cb8055640ae5ceddd6cfdaceda48f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKZGC2408488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d33984159fe4e2497ba3b8566ba0cee73401daabaabac7e3cc04a3207106ad. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/UKZGC2305533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe198e4f2047e0cc5f5ac2be61a79fb6e36f485e256f4875372afde57eac5388e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US3DF2440994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbb9a11c1d38e74204269d1477bd9552915330d80a6a7f7efc16728ced8e671. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/UKZGC2406946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde88c6253e20c765f9453c62dbe51e77db30a6de5fb72ebbcf42d31a91beaa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UKZGC2406954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d0454f8e57c007e8484d8690f8197fb97d841c219ff22bbabe7c4304b7314d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UKZGC2407523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f3b7311b8b7ff567c07b660e820365185c9a1793e99dbc7894d091c287e033. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKZGC2406178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdca3ba0e586741621780d9806394e87391700a3f8a50b33f9e26487cc340cd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/UKZGC2405959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c25fb5cbc62649a109171ff9141d65bfef077049bd03a4b92724e9f0420db. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UKZGC2404270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937e2e4c0e7c12f361e8ba937e7f630f420254a130a7a085d1ea2531a9fdeb20. 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/UKZGC2405690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063fc7033774920ed14741aa1eaa4213c86a710ae146f023ea5b849cbde53ae. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/UKZGC2404436.