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 0x58f8fe896067bef1ccce0694c9ed59a3701d1b80ec7d91340190b45fae89ac47. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25b85443-87a2-4e61-9857-699b3d0a47c9.json and https://artists.proofprofile.net/proofs/artist/25b85443-87a2-4e61-9857-699b3d0a47c9.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 0xd68bf1b0b96f55c42b439bd27002c280bf0f31de2fd57381f983df86143c6b33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TX2398934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665bad9036e7a9dc24f286d8bf1f0b7a76ff308cefec6ecc28e5160f8845d8e5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2398930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68bf1b0b96f55c42b439bd27002c280bf0f31de2fd57381f983df86143c6b33. 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/QM4TX2398934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38b21374efe9fba5c955708c4b36bc60b4352e85d99bfc33b4b52efe5f02cf5. 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/QMDA62320004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84aad2bf77e6e3d0054dabc7260f0677718ca573b37869e71b001a3aae0478. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2367078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe342b138e65b5171a928bd4fcad67709eb0cacce1c862ac3afccfc48e66b8e54. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2364723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee24cff0c765226251db100eab63a61279756ecafa12486d1a404bf62e829422. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX202288230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6500438046c6d9da6aaad09b7e09f41d30b262be6f49d62395cea70e8944fac3. 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/QM4TX2209148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b840aa5d41323a55af4a813d21ef1ab9e2002acda7e1eb03fea983e384751. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62162885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf925513181ea7ddf577e20475cdc4990eecb2c4ee60ad912dca54759d8ebbb1b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22116540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e003307e3bb3fce1894763d0d71b691b8f9c239cc3b504e96c7acacc8895a87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2093099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89184582d3bdf9a89a9ae27bbde828e270c1f6de4b2ca9a14aadb080dd59a298. 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/QMFME2051213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748e56432bb244b69d51998ee2d77383c6920e275b78a0214e111abf13270901. 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/QM7282055438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5563b669d494cc8603643a73e5ee04579682779a8146026d216b348a489f26e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQX92403944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec4bd68c566725e5a87053fbf96617f6d2fe3a7e27e94ac3e4cdaad7c89e95. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFMF2433475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afdcf82974d1ace97d2c8a7bead42621e43741b1f3852c44beda322388d0889. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2582374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d834edcd1016c0a1fe27f2989d6c8e7880c9159bcb6a629d63ad50c4ae5d34e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN2012395.