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 0x408b8f06e8ec4b30a5dda334625e179b4f2a7fb045b301e6714adddce4a346cc. 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/8f5b3ceb-4ba2-4221-8ef5-08013b66b2b0.json and https://artists.proofprofile.net/proofs/artist/8f5b3ceb-4ba2-4221-8ef5-08013b66b2b0.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 0x0c8ba0340d2dc9c9afbaa771926c9f49813ec2774b1ceebc4b0475fe875ebede. 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/USANG2249977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279b73da49e7f7e24599aaae20dcdcd92b1aca9a7b85a4d9ac6cdf71f7f507ee. 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/USANG2258300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b821c624b324365205c07e57e2208fdc4767de6161cf5f092c567169c692fb5. 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/USANG2271650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaff2a2c7c0d1b75981ed6661b4d530903c816843220b5e2357036b707dd4fa. 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/USANG2276528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5308c4c19d11f6b63836d9dd16a6716aa6dc8e59cacb6e780b5e165ba8390f4c. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:24:29Z), 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/UKZGC2301054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13387ca5213370ad763247f74969c6eb5cb1695adabfa8d74290c9862e42a743. 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/USANG2288738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa254510a12cb560140528b6b55022dd19f56899d159fd1fd9d256a3a8584009a. 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/GX8KD2387753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22348c573595694517b8df656cd8386604f4bd26ac04f9153897b29f7df52f39. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/UKZGC2301729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449ec65ed1e64800be64ce0af6f0d96d96cf42155a45729533ad81e1d91ff878. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:51:17Z), 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/QM3DF2203801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90229bbaceabff07e076e64ee6138e4894bc550e436758a407127ebddff5df. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKZGC2302792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88750a742fb1ed2dc9d55a01545f9fe133bb8033227869332744c441565702c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:49Z), 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/UKZGC2303011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd060a57ab8f732d828f3fdce509eaefd13113a9a6b59f99ecd6e3ffd198c9b. 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/QM3DF2263841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca6e48dfa933077561c2338008a5237184857439ce3cd12bcd5712791c12d18. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:53Z), 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/QM3DF2288542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f81e28b4a65a018dcaa3b31694a1f5b85d07565d9b01722e5fff168f3dc759. 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/UKZGC2308178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b0e675fa7c73357d4790a296099be7101c0af47607df5b3d1e55db15461062. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QMANG2234091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8e43078ca7f0be823e4da78654e108cbc10dea070628062741af87d6c00097. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QMANG2234092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9b02a1f28d97ab54ec1553676867d42967d41e9efe3fb86e24f07dfe42b6d3. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMANG2234096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0980187bbb1672b4f4cd0ec800049ddd81b774d6662ff7e9fb98913b951c2cc0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/US3DF2401979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c1c15640f25525193382d6bc986c9ab59b6c284f4eedb41b8a7f9ff6b3597d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:41:24Z), 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/UKZGC2402558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674dd429ea9d6f11bd3f7fceb532d5d022ebf892cf6b8b2d53da8cd89755d62f. 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/UKZGC2402553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c4a1ebeb9d47cecb8e86c44c4621b6db21da6848dec883990afe4a767c2935. 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/US3DF2536411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a927766567d2100cbcd7c9c1d056491129bdb60a23c6f594b68dc62f3f0b3. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US3DF2536412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fc54873086c0e8834925f16b2dbe28132c4c17161c676d7613c4fad7e0403b. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/US3DF2536413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35251fc6d6573acc870f6ac5789b7a16ecb0d4c6d21548d52fca93435a9042. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/US3DF2544420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30a4eea0c02dc0554753339738e530de9cb4c85d72b8205dffa98717a36b3a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:38Z), 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/UKZGC2502865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b7908fe1fad7186ef08847afcc4cdd2058bb3fba6de388e2abc9684c248301. 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/UKZGC2504502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ad297edcc434e6c36b6b6c73399091b7a140b1b65c050c8b2b3291984944c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/UKZGC2504507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f261044f41fd71ad5ab60b77deac6ba5934d57b966ec590946c909df47fe8e. 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/UKZGC2504508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006eb11fa3ef626c34fb90fd31722418f64903407b6761b5cb43721cb24d9c04. 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/USANG2530439.