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 0x9d5d3f55d7f9103a854466e71c7d93dd65094250ad218c374541b9dabfbcc7b9. 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/c8a7515b-40f1-4a9a-83d8-48130a6a3cdd.json and https://artists.proofprofile.net/proofs/artist/c8a7515b-40f1-4a9a-83d8-48130a6a3cdd.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 0x26dda8ada3068268139d72b830ed475f299d2b10382d2d5f35da328a6e9df430. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2115027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb66265da4892d523d6a577e12b914b0ec60da6752a51e310f469d58ffc9733. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZPLS2397491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1646feca41e9d5cdc70e53144836d5573c3259c9d921028f55c130e5dd9593. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZPLS2397492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670ad898a4a8419c8fbdf1edab2628be8ad1ef3633baabe39de1a82f34a4badf. 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/QZPLS2397493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb763fa657a8ced551fca4be413fd3fa1154ecc14905d306845a78492e1f2043. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZPLS2397494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b8baf36506173ff73d3cee50ac7bcdad2d2609847933626380202d7992b903. 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/QZPLS2397495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c0624307e55b04cb1033f38ee3b51d41680223eb775320209a3171c8acf9c4. 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/QZPLS2397497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3d4885e9ad0b8abbf8b1fa8aa5d1fd25babe6484dfa8aeac631713e756893e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZPLS2397503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95430b9031a0a8a13b39016d94db9168f4c3951ffb69e26b907f7de347184fe. 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/QZPLS2397505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba61f51990a0600c31ef8cc0d82ebb9f76c64925f1d9d762a85549cbc3770137. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMEP2263034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84087a42596bbf14331b5373be63996b91faa268f0d61e4df3492bb389293b7d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWY2206653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebf1b5f98fdd98f96dd458984da77ef2fc96257d673ad4ae7487dca1dbbfd8d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZFZ22374937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685caa47c15f3469bc2fbf565d46ed14467cbbe8bec450ae19b5ce6ea762f554. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZFYY2275468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba041327fe52fe0e44ead44c759e75106efb7ba6ba35c9fb5d77462564969922. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZPLS2397496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936273c87aba20467a89fc4517b7ee15d70543ddf16c438d12725e7000d55bbc. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZPLS2397500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25959cd188a47672bca37b5379f463a78a9fa5b14cd4d14f9f61078b5803834d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZPLS2397507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591041e4b90c7bc6315d42d7340f9f97f34e763cca5e20dfce68e701e9d1b111. 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/QZPLS2397509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5b192f8713c9f61ca4de32dcbf71b907d12f93f763d81e49f7007ea1e51d21. 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/QZDA42249206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf472611c376c5a4005f66256591331c4259ba3d41d919bd0c59151d1c73449b6. 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/QZFZ32219905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491270c066888a188e5d14e3c44866722568c93e5ed52ebdc7b249a825e37d79. 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/QZNMT2062197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c9b98735f7f5f92851367577b06abf56edec5b4a52b317a1c4d676b400a883. 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/QZL382074706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fcd0d6b37121f2e06fdbde9c2042c86f2f01d7d55b91873135bf864210f36f. 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/QZ85M2058743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d91fde932167b5f89cbe38f9bde414bad4836e32c81b899c00587552cab52fb. 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/QZJG51940201.