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 0x49f009e80dcce3ae4f29d10d3873ad2a1714676861779adffd8a155f99b6a546. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58d317da-4f81-4921-a5c9-4e53900c37c0.json and https://artists.proofprofile.net/proofs/artist/58d317da-4f81-4921-a5c9-4e53900c37c0.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 0x4305b47b7b6bda84ed6b21a2a5d299002687540b9225eef789598267f21135d5. 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/TCJPP2168253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cef8d957897c0ae787fbc2c7ae534faaec083632af7ce2252f5639cf853132. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPW2306567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef34bd2cd38299174425e7f92377102668c854cb2466af65cac69e49fc8011b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPW2306572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9339318340b2a72e5ae2381ef3ba4dbcdf444820d56323fb78bfe8e2580e6ec0. 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/TCJPW2306574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bcf188ca7af7071108515281cc5d8267de23aa3b13f48cc094fb7dbec5a2b9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCJPW2306580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d93bb3c15193a42ff3e4f2f6519413f374d6ca593a6b78353df724fd4cab62f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPW2306588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea117c7edbbca3e994065dbd174851b7b93e8d0f861bfce2ba104221da3778. 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/JPL542400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5084a2dd69dc9615a60c86b276b85fa9989ad3c758ced4462a46a69aa88eed09. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/JPL542400654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914a3fd1ada1fec55234bffa0e380dfe9ed4fe336dc2bd9f571063ae36c0a9b7. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/JPL542400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48fe534bab7a6b13c0aedaffa93106f7d6c3dbb343d6294eb6b924b1a244514. 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/JPL542400657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe699c88611ad6ca9ed065d587491ecb70a375089d313fd3ac5101b03936dbc9e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPL542400658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5226d69a5f45920394defde0b4f5b903d0fd6125e514b6037fd172da15cd29bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPL542400660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db0e5e0f7a3247b920d5de795130ac50f4d8bd320f731ff9e3ba47622990695. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPL542400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62dffe7144513cc8c68697850ef8597a984ae92984b433938f6e5b0885a2a0d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPL542400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de6decf52cd8386a4f165ea5f9a5bcefa64ce7263212cb5fd693895d344d889. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPD2590923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d310d36328be31aacf036790ce4fcf07b51213e5e983f55c079091c3c71548f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCJPD2590945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583c31cf2376e25f7019bd858d444035b265108fb13fffc8257b667f208422b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPE2502315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c453aca8f1f604648adc5b73b0cb910b9c3f5ebfa4bcb15bed9c3944eea9bd0. 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/TCJPE2502343.