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 0xe761fddacf75d398bd8f37fa87afb2c37a1231621f23313c7e39a5283d832e0f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afb7b7cc-12d6-44a9-a5ba-12dfc6d08551.json and https://artists.proofprofile.net/proofs/artist/afb7b7cc-12d6-44a9-a5ba-12dfc6d08551.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 0xbbec888815d95fd8ae4d107ad2ffcf5f03af0eb3b08a0d91f65f4fb1565a64b5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZHN92546372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a297babbc3873726130f3aec8f54f2ed37e59ab7b0924b12995c4185fd7a6. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZHNB2574779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedaf1f8a1fa796d124200b6062fd8038d5f03a7941cf243504d06115ff9edd5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHNB2590687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8551ffd27b2c77f067cf2e711553d0700308978d5f3d7a67eb0c9f288eaaa50. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHNB2576300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a630f658823f77a91f36ee7f2ff80ef31b9d1f3110514650965b9b298e4ee19. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNB2587528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8043453824db7f26468cc289a6284cfccf1713dd6c39ed8e6accc9d62ae6f99. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZK6G2569238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef07b525fb10e438a11175634d819a906b85ad691c9f460c5124caa0fe89686. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZMEM2524959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bcf7f6cbd12c3669dfc2e021ad6a715129dd6882de0aae2eb6f783aa3674c9. 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/QZMEM2526181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e25e0279d99adbc33ac3e354f598e9c810031f422ec107089dcd7d121c123de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEN2540399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72299b6c0441223921135d904f8ea6748261badd2a265662c6d7d1c7321f0b7b. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZMER2562304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8ec0f9fe35d66e8f1194ebb7759cb2826f206559c2d5f268c8f1626dcdaeff. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZMER2560944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2310aaf2a617723eb5db4529b6bf13f8430acb7de63583eae80db4dcb66940ed. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:21:47Z), 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/QZMER2573441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b57a9b2fbe953c3b3fcd1bd619d072a404098fadaef001373fad88f630faa. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:03:30Z), 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/QZNWQ2545666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc323df2ae4942caadcab5ca062a39d812395f70de6929604c2685fbc3c8f4b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:25Z), 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/QZTB72599173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dac10ee11d716e210776fc324eb2e2f39e7a5852edd0581d5a7f3556b7fdfd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB82501399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1762a736c27ffb00d2b3d2fedff818f0968ab22e7ecc395fbd23cffa0946bf61. 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/QZTB82554900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab7f64ba425c81d00f3ca2a3331962bde7ab6e1482ae9407c29153838125f93. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB82557403.