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 0x3884dbc5adfd10bf8027305ec8355f57487facae3761ab0909a76d6849328124. 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/57ccb25a-a9db-454d-8413-60e27c74c83d.json and https://artists.proofprofile.net/proofs/artist/57ccb25a-a9db-454d-8413-60e27c74c83d.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 0x12ef8df4a30f503e554f3aca80d6b2f15fd6467a52c4c05da66ef8cc1dab4bfa. 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/KRB632010001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4272885fa53578790e34846e394f959be38b93939e55c9fd1b6496cde1f5f36. 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/KRB632010002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f440156b2e2c9c1f445a4f8212cf1114a2394ed13d65d1d17c5255440e7833. 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/KRB632010003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7804fa6a4a8da74ef37f54bdc87c590b4fe4db4e59e598a780f6ef30ab5dd6. 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/KRB632010005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca56ccac2eba878aa85f00d8974ac8728be6c029da098a2770450831e279f6. 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/KRB632010007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388ec33e1fca0bf6230c2f9ce9b7e37596c7069c99dc70c8ce2788caaadc3c9. 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/KRB631910001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0daaa0b20ad9feabebf382e9d85cdddc7e465474fe60e21e591ef4beece099. 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/KRB631910002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0374914b822d44af04a63d457a3d93bbea745a36110215dbd246b3ed85715d7e. 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/KRB631910003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2556c4291c1e166a54621f07bd5a27fa31c2cecaeaf16e5cac96b872a616fd78. 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/KRB631910004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5301736faf9b8f58cbcecfa9fcad704ec10a7fc29482b999d260fcd1d90fa3. 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/KRB631910005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c23ffd3de398f30a8ee9e0717e843638d4193cdbfc3b4685b5ad8602091bb1. 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/KRB631910006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518c13dd038a24b5dcc292cef72184f04ddecded58a03f4867f558bfb28e5893. 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/KRB631910007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c4f410e7b8b76eb80a6f0483f6a33414ac92ceb1278b0a4c1bdbe2b479ba98. 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/KRB631910008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dd46335041288fb8315b503429cc2bb6342bd47d6ced8640c817b9a6f70517. 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/KRB631910009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e1aef3daf11917a1166b82f712f3467598f35d722ad8dffa4af4dceb19f126. 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/KRB631910010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6a4f30de9d3573bdfab17ccf95e12382016aada902629ad235505606d64333. 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/KRB631910011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752902e7aaa7c09ad34ba811158af9aacb87ef549ea8232059799012c249b38d. 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/KRB631910012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b05a6b89c55cc00d4785980ee18086989be5e72f7588331cf497023cbca1a. 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/KRB631630001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d18f2b0ca2bb0609c3b7be0dce33ae3d23f6b8c1e7111c4363010415c71b27. 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/KRB631630002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a107846fc4bd2eb9dcaa9c28e12be0b75f81624e811cf6eb02167340010ba3. 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/KRB631630003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e67d0f5a688e598c961aee03b8bdcbfd9a34f3dc1217683e2b2f81e5abaf7a. 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/KRB631630004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda64118356bfd6ebe7ac9c0fbd4e2f803655686a0d0710be08627aab4c4a4165. 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/KRB631630007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edc67d04431bd7703f7de32690b7163e49690300170841d67036a80f8bd9aa5. 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/KRB631630008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc977d6e13bfedd2b47ba3348421ad5d6f7123525419c69826734540b630cd020. 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/KRB631630009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d17721076c1a0f7510b8b09e2a9408ae3de478792925bc01476ff19795f855. 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/KRB631630010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55ca8a89e43a35fe9b27b39834191653a566481f554f56a6c912880638e589a. 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/KRB631630011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8d51b68183a98afa9313fbd33f99c119ec07cfdd56d559f3ca660fca455767. 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/KRB631630012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f80f318b571e849f1ec7b3026568c32c78da3a79f15a50fd4d13fa7862e6c0e. 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/KRB631630013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730c84118237f0d1286cb5c4368aa1a762c65c3515d0dbc708239302936962c5. 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/KRB631630016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4917ae31f82e0d5984c4fb5a771b6aa4c8b9ee8fa2af1e024cb51a8b7e5db25f. 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/KRB631630017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272bcb28b86b426a085cfedfc5685bd661fd23ad5b2623b8e374cd55c46a4c1c. 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/KRB631630018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9826143d4b0e61e71b7ba7d88962c2873a106ff80937d71cac4a68965e1f5600. 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/KRB631431028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4033f3837ef3bbaa6498a852f86f41bc5fda17143bf948df128c8684e6f4859. 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/KRB631331020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8bc4ef9232d43c940d36d7ae81eb06b51d7d02af23fe3bea4e2a7e86e41930. 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/KRB632530001.