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 0xf1c02ca6c230b537aec5caac0468d6c98a111e8aeb87e63078931751dbe66270. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0f22481-cfc6-4529-8d9f-f5fbf068c8b3.json and https://artists.proofprofile.net/proofs/artist/b0f22481-cfc6-4529-8d9f-f5fbf068c8b3.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 0x026f7c29f09d9160cc7e81d0670368dfa7a6bde43a95b063fc2334fb147de724. 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/CADA49900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064e28b3687016305aa75d8f1011b8cfaf0911885669d69b03eb74cefce72e04. 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/CADA41300002.
Mating Song of the Big Headed North American Bar Swine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33fe9f2ce69931e30f1f0fdb38eedb6f61a5367e6d92577eb2938c3424a4e89. 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/CADA40200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3077cec1e9988d33cc4581e6c8419c3e8c2b4e28bba9d0e7b97d24f2e4d2eca. 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/CADA40200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756e55b130e92660966c8e521cba13bda158afe6234f945ff4c26c5d51b10572. 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/CADA40200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a63f2105826bb414a69c8c8a4cb489eefe4ec1f7b78adffa68f20134f874440. 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/CADA40200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ae3436c5ee09c9aa66d63755d44e2fd2639260335ca89ee673f94a89e0e615. 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/CADA40200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356797f29a11510850eb81b39df7c891a63c9f30664512e4cebad22b30f974b6. 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/CADA40400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ef47897ab3ed217d2d48a3cea980010c5376d83531f48c2418f7d86636a800. 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/CADA30400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc668dd95f3c886da5caff036420300e1297157bb85e617290f70f5e44a896. 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/CADA40900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e240fb1da221e1ed5f998dc05e053f5705d656af98cbe9afa171575aaca79e4. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/CADA40900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd99668ceec47ef8b7f1565a8973f81d0fd2344aa28f38572b12edbcaf5a4fb0. 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/CADA40900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5035700e1974451023ca3fb3c053f4edbe059ea7493decb5f4dd77ebb04b8c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CADA40900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29c3d696e96a2bc8757ba317c0044e1cf8517cf963eb496bd5fcfc19f597480. 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/CADA40900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a713fa18ace36a9712c7c788eb68c0c92c6a1c0151541fbd4211d47aca8549a. 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/CADA40900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73de72e56003a9d2bcd34ae046e5553101779e92c8b265963bc33069439128e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CADA40900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9eb6475ca11e3c07707a494de05cdeaab648e1c0ebc5047f158962fc193771. 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/CADA40900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110dbb937845b6a8d42f6334c59cd6ccf65dd951f11a7f0a3d071be04198d38. 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/CADA40900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d26dabd273437fe18633c1a97b6d58a7676892f0eea378cf3b62c836c04071. 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/CADA40900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45adeb013d2ad00411f8249f0bda93ac8edc805d86383675a95727b66665735. 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/US89R1013600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76256a1d0b91588fd2a79c029be6e05fc1b5982e9c233dd4e9d420b1b581653b. 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/US89R1013601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcd21be338aa091e160ea952d09059fe96d99e07d558345eddd4b9bd39b675f. 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/US89R1013613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da9c3c93f77a6cf47285fb07a2b3fb56a222bab97928d1afdd8c49620b1d547. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US89R1013614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b31f9b0a7500761ac18d7114208e25d584c2b00c1179d3ffd157d9d9006e9. 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/US89R1013603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8549b30a86422cc25f922feb3dc66ed3ff289d7990a7d1bbc360b3a5236c48cc. 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/US89R1013615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0ac27e415f7e806467f2a4d6ce84ee331546fea966dcaa0d0e6b628bb0d307. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US89R1013616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c91045421ef60a970c197a3898b2e301f8d3726cdb75049d4485d981267a69. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US89R1013617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f81b6efa4bfe8d1a92dbbfa37b6d9c4c475a001b71fcd6ce898ccba7106037. 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/US89R1013618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c075c5c8a35f272d9698d10f46b765d8abfc38c943c14468b620328a5777df. 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/US89R1013607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fd459c076779fbae8c369424cadc618682ec290ab419e6343d09e0aaa8ddd4. 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/US89R1013619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2461651c28f971eae2abacb9774bc94d374cf208b335d4b119e137837b9c8c. 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/US89R1013609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1719b7185369e8968ed92cb11a3de355a8ebc40912e3b1503f38ca52e08697. 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/US89R1013621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf235b3a9af037a26a00ca0c1c3d38f84743fa542f0503b2a46e96b2839fd19a7. 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/US89R1013610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ffda0f9463be9a01712a4c5e6d745445295da0a81c19fb3a3ba17d0a750ab. 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/US89R1013622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29c2dc470e54808b7ba803e8d3542e3cde4c1d10d0aa9ab97b1647dd04368c. 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/US89R1013623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e88e153160ee6776b513228d602dc6b7b3326597a2c60c4bcafb9f821fdf6b4. 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/US89R1013624.