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 0xf26a75d560136fa6346b03f3b1958b0e542896d3e2baced1faee9eefe413c108. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9e4edda-c7e1-4247-85be-a2fcdfdcd9ff.json and https://artists.proofprofile.net/proofs/artist/d9e4edda-c7e1-4247-85be-a2fcdfdcd9ff.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 0xeb7235ba8406b405069556db82fa062a7f0198bd1ca2d557a788edeb53eb9555. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US23A1576810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827e801b89902da75ad0b19cd3a5bab20a6ad3dd53ec9527c76b0df1861c37ed. 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/US23A1573678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9dd1a60509c511bade140968314c582ed538f17ad0246226d139c21357eae. 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/US23A1570715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb19be2441a2eabfdbcd47c837e53174ba2d153fed7843a017ea850ca4e0c492. 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/US23A1582083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49c41fb401e18248485728043d501338757def55237438c132991a45538c95e. 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/US23A1573679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7259bee4c59083ad8d8e5870d440d3ad6257e043b4be53a8b4afd0882d9fec23. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US23A1568616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eea1ae8b19d5ef616eb568c2528742c366ce3c840e902f0e8309dce4b97866c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US23A1568619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3702821ee72fdeab4de3e64c9226e8d8f53ae3f1dbbbdf8a33cde63d05849. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAGM2285839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e779773932e7f137d6fe705661aa69ac075af79b60c822bc6f94ea9ad6ef0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAGF2246847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbee259f23f5a5ff21f62148cbf4d6c09dab89a49b64e429abeee2ea18b340. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAGI2204166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2151764057e2ae6cd81bfc7afdc68ee2139af8446d6ef3b8bd4ff65893fa69de. 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/TCAGI2204185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f93849cc72f790b6c01b7a0fac0b039fa2b70559a9e3ce0deb9287fea169eb1. 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/TCAGE2261350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1f8c8c2bb15c7a7d7b5de3afb892b51e86b1b9f6daa490eaa5bd5b9fa943b4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAGE2261354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d4d32744a9bef5157ccfc047d093b0f10fe44fa82c7eed021348a26493368. 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/TCAGE2261372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99d8d006319bd1260153fdad846155753e575a008bf631f7e34bda6db00509f. 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/US23A1588460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727819f73e0e41367254f41e71d849d24f4db4f023b88dff9c91b54908d00054. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US23A1576814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515609db2b1fc81cb3bae08e3a119a596801a84852575e78e168a50d02a4bf21. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US23A1585761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ab3a9620bd400c601e1433ae555559458992451905a0629f1213cc2711df95. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/US23A1584862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb19be2441a2eabfdbcd47c837e53174ba2d153fed7843a017ea850ca4e0c492. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US23A1582083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e211aff754fe7e9712599996d80db833773217a27d65f393395ff06310a7a2. 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/US23A1578344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f0e081ed938773d395187be6763e904bd551491ee1e2bc884525888fbac443. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US23A1578345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182ed86dd355e9467fa24c77dcbe38e1d8bdac6ef3c17ad36b0de427e53aa232. 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/US23A1578346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba42d4c39f44107d2c637ab2d527af8111224576e291bc25a7bd547f8eb70ec. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US23A1578348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7235ba8406b405069556db82fa062a7f0198bd1ca2d557a788edeb53eb9555. 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/US23A1576810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727819f73e0e41367254f41e71d849d24f4db4f023b88dff9c91b54908d00054. 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/US23A1576814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84b3e64269ffc78f661638a34a03df05fe2e515f03f9b23d8a51df62b53f617. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/US23A1576815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8513af85ecf90379bc7b2e7e6e48990028d97b307355af8c88cfdcf9069f95. 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/US23A1574369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19827a798369862a021990b03efea7ca7e3955c9899193f2328a163dbcca63b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/US23A1573680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d5c1cd1a52a9be7322ac1f8a60e7bb54890e23d908f26081a2f316a51775bf. 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/US23A1572058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb99bf0606aa226c46c9e8b0686232ca66052d302b935689049207c11325b3f. 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/US23A1572059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a9dd1a60509c511bade140968314c582ed538f17ad0246226d139c21357eae. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US23A1570715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7259bee4c59083ad8d8e5870d440d3ad6257e043b4be53a8b4afd0882d9fec23. 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/US23A1568616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e49fa0ff96a11db34af014cedfd306c8f0c10056dd421f7f67b7fd8426d80. 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/US23A1568617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a0f7902624efd45e91d9d0ba3efa0e1505ce875524a2327c6e55f3357aa0f7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US23A1567024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fd5494b9aa6edbb788ef6febdddc30f5bb2298169d4d9919bc057ba5a567c6. 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/US23A1567025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce8445d2fef257daca277d71395398a435587f17896400c300ee12fbf66378. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/US23A1567027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e432bc9f18da6b9a44ea6685401779f77a80356180cbfd7dcfac53b5e966cc9. 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/TCAGR2260098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115344dd93c706cd4f5a3fb0f05856463ac8b741e270c9d2318872a947034b5c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAGO2286526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d175ead3043b8c826f264b03b52177f4c03eb256880282340f6ff9e2c56ab24. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TCAGM2285847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d0b2f97bda3fad6b3c38683a7f3d300dd1d303f0132423e9aa4a6dde3a7ec. 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/TCAGF2246832.