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 0xab5e3a0bb2f55c4b5512a6606103b6b285101f1f970103de62baba91f0364ed0. 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/b7993391-3581-4311-9f51-5cd5bc8cf055.json and https://artists.proofprofile.net/proofs/artist/b7993391-3581-4311-9f51-5cd5bc8cf055.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 0x8604db8c8f168749545058222b5a45dfbdbac93d760e6a2d776486d658dbeb57. 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/QZMEN2416468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6683de13c2423ab6a996f939f40bf869d8b04c65b3fe0484c735bfc91184c8. 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/QZMEN2416469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065633a7ed2774618ebd459c14a84ba4ab7ee7c669bc183e2912595eddbb86f0. 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/QZMEN2416470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d454ac97c1d84a013cff250904ad4a3636175eaa2c3e6ed0d04b285892e83d. 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/QZMEN2416471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187b16e9369cc57cc3fb428919605935996d3c555e6732a6b7c0578de75748c7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEN2416472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc90b07fedce8fccac82a84cfac98db2350207821c827243c3fe18595df092. 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/QZMEN2416473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57faa5bd76747666055ad18a0b9be7d92c7e82a4369d2022274949cde0b9132. 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/QZMEN2416474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eb8e9de4c8496bee7f2f9ff5df4d334588aafe3610120c0f6dbfea5e63a4f3. 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/QZMEN2416475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b61dd2da1b3c0f4aff9d235e7f9baed3974e96fb6a4cc8a0da9b99612a23a3f. 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/QZMEN2416476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9aceb03c3cef84ce1c1929e7ba7e8d9eb37effec0844032b70f37dfb18e6b4a. 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/QZMEN2416477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a7dc7f05a7d72392d8010810be207a02a562b0d65afd4010193cdb3dab5fa9. 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/QZMEN2416478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995816047d3fab4b7d666ce67432c56def5acacfcf83d6f05f26a0b805e20d2b. 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/QZMEN2416479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3676b0916c457b67804d03e75ac30342386ce1f4627092222ccaed54de5bd6e6. 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/QZMEN2416480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bdd26a16cc5100830973cfba02dfb12e62d9e454c1b541b3bfbff03e51a4cb. 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/QZNWX2405503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733591193b9d737c750546c5420c272be6701f823e429ef3534f45855fd5cbda. 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/QZNWX2405504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2d76f4443b5c9aacecf118e0dff8d90456ba346df08f3f0a6d12520d30940d. 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/QZNWX2405507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe94f5d841273880f4c639c0c9dfa30f1dde575062b993a4c956101e8b7a382. 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/QZNWX2405508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fbfe7ebaba28bc05f1be7298e7c0ace293424d9f3d15938b6a478a19199df5. 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/QZNWX2405511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea96b4cdf8e8eb98e2dcf09d58820d2878ecea247430518e9735bc3a5985556. 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/QZNWX2405512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316ee5d98da494713a31d5600f76900a5ff1690dcbed6f7d81d72759ba18619c. 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/QZNWX2405513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82904e4baa78ef824749cdbe1d2b801fcdd9fed01815b75ace72997219484c7. 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/QZES82485552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ef5d9f9f45117007b0ebbaac6ca62ba25294b2b1ae2e36238403f24d91401d. 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/QZTAW2339801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a06ba3e59f86af3147c23386f7e9347605cfa23a93506d73f2f0766e2fb3e5. 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/QZNWV2340997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a645346ef7f8df9915343f1d4edc3c04aaab1d8649058e1014daa08b90d2e1b. 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/QZMEQ2395847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb147267a7cef5d77ef63f459b530514f6ffcb696e5348a855e2553c0b68b0. 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/TCAEY2035707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2dcd98d0670bd8da5715ccaab3a88ffdf80a2fd8cc9c141f1bea4e040f6092. 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/TCAEX2013341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25af49947af1a068597dd6e7ff1e6ce31bfd9395c7738efb9239891beb6190a2. 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/QZTB22357650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fbc0a89499572cfdd61c7197ec52a1cf792b24089bcc7938b18fdf654dceec. 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/QZTB22357651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f15103fa46d309599eded82855e3a4adf9e07c84b3a0a5107c10080f32cbd. 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/QZTB22357652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f8f49d573e2a9d1bb7d17f3c7267bd8922de8760dfdecde93840973d32a35. 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/QZTB22357653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f82a8c33f597364fe6892b9ac2a7cdb8fd627d2b3fc0e05a6b7d5361763a25. 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/QZTB22357654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6647318695b620f9de79da4324f9112ca4f0063b5fabde0c0185c8fa2ca868. 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/QZTB22357655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc327887db30e0388643de02edc8d0b0baf787170501bc8f87d6a6d2e4ca21f9. 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/NLDP10800288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fd9a8896ce0b01ec0f632802b428ec89d9e953ca3dfb4909de52e194926871. 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/NLDP10800281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c781f4932b3b534a9d0ea64e373c28f1662b4ef98dbbdf37912285044a8c4d. 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/NLDP10800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ed08174a95124b4885a593ac589b6f057c54e6dfa13812c83a01949cc5ddc. 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/NLDP10800294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fab3d7142cc1a3b2658eafcf3a6aedd2e3a2f4be93156e6205d3cc9b7fc4c6e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZK6L2299048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba374dad98a061994d033a719ab0492fe4c330345e99fbc55ec62cbb44b7b455. 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/QZDA82183331.