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 0x13fa8d94c7733c052cb9ea478369a4d5cb3dcd88fbd84170d7993a07f8dd8917. 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/88b6d551-9599-4ce4-90cf-7cddb1090d80.json and https://artists.proofprofile.net/proofs/artist/88b6d551-9599-4ce4-90cf-7cddb1090d80.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 0xf206d8b9d730b5844c3df067c3e1cc743ee042de04d752fc276b855547466719. 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/LTF982400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89a19f1656fe4a8c8830d790c0d38073ec7ba249d41223543816f686a807511. 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/LTF982400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6d75512e8194cc794b6d22fd225002cf408cfc84f09c563cfdf8721ca36db4. 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/LTF982400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199dd587023c5197179d19a68bf18655168daf1d7149554a9e65eaa267c883ca. 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/LTF982400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97813fbd28b5e58b64834bd2275e7c9e913ae4ab1ca3343fda1b469d531c0c2. 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/LTF982400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82007d3e4d0284e755411df202165afa259542587823c01bbeab83222cb5091c. 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/LTF982400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72576d84a24ad5f7f5c43b56b240057f226ab100c9d2a793a14b917a666796cd. 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/LTF982400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76954554db8e25a912d0d722d4d7965df66ef732d8b12a74a474544d57a5d31. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/LTF982400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e3ebd38c9ebe1bc153dd910a5dbc81e1b8f10f1aca1c671311aa5d6972519f. 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/LTK582300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e1df14ddeee18d17a6554bba75971b996d600ea314e483f5f69bb3e96328fb. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/LTK582300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf232266abe1e7ae713f7edd6a6930b81d81ee41b507f0d071ea6cdb6270f5348. 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/LTK582300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7631e5124d865d2d4c0febfd32f726e616b76cc44ae1b940350c3fff108c593d. 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/LTK582300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6514196f6808e025870ca2118895b490c94b175982af8f2a9a0095cd06cd3f. 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/LTF982200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a048f05863cb6aadc7386f29e645f38a79dafe9795ae58c8e7228ff3bbf344d. 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/LTK582200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bf5c45ea23fb9b8ed70498fe866ee40583f3ba303b6fc79c55a04ba99de05f. 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/LTK582300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7631e5124d865d2d4c0febfd32f726e616b76cc44ae1b940350c3fff108c593d. 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/LTK582300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e86747e4eb8e4165c622589c0432abe98fb3a0746be3123769fb8cde527bb92. 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/LTM482300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a048f05863cb6aadc7386f29e645f38a79dafe9795ae58c8e7228ff3bbf344d. 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/LTK582200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6514196f6808e025870ca2118895b490c94b175982af8f2a9a0095cd06cd3f. 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/LTF982200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760618df9fa90fc2979c58bae466d39405e7058cb2d3abfa79fd632b6673ab62. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/LTF982100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a23665f7ee643adc4da6521784803fb5503fe725f6437cdb4c124957209d446. 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/LTF982100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b10bdc7c5a7b33c88b1269837d3cbc2c169f92fe350a9bbbab83496c0584a5. 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/LTF982100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3659502c915f5142f5a8f074f91fa22a84b6d4eb6c738483cd7d3cee04000. 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/LTF982100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b2e79928d900fa10e6fcd598fd8341cd2744f51729aee67a735bb8f227685e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/LTF982100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4997b26367a596c182af37094b77172c11fc1c758b7f07559f083fe34b9ac0cb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/LTF982100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e4764277fb471be1d276ab1405c78cf589bf5b76189a63dd0802d7b9a1a62. 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/LTF982000002.