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 0xf6a4659e038b7877bb757f661133f812ca851c27a2565d2e92a7ba3a3a516028. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecaf3b80-f553-4ce9-8da1-6f0b79783270.json and https://artists.proofprofile.net/proofs/artist/ecaf3b80-f553-4ce9-8da1-6f0b79783270.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 0x6358f0a22d99ce0516272af1779561af697882bcd8129f9beea75c184be1bae3. 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/BCJQG2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b40c821dc611969c12f99a37418115a1947ccba251d20e946570aa45adc1ebe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCJQG2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d288afd6e338f7b190aceb9531bb52c811533ee431c5ca8eb4ff193a0db9fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCJQG2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85df701c7ce9628187dbeb348d1c384fffc549e64fd0443fba8b488b82b78edd. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/BCJQG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a638b87db9bd40170aae3a47bddf57beb427d7751050f7719a277cbaa3c6b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCJQG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8442c92b9abe57ec2078fd92fdc5095367a8b5a91c9b27f794b955d993a247. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BCJQG2300013.
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 0xf36cf5d14f2642aa3fe3445264ef136ef3fdb06092c498218de8c12f09ab9f5a. 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/BCJQG2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c956eddd27bb4bde1d34c1d30ada08a4b09dbb055ca4ebe324a01a0d143fe8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BCJQG2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0dc387f448a258b18d7ca04366cd417ab70e6880788e17e19c736f77b6f10. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BCJQG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce49ba12174555bf14fe466dfef06cfa5d2d49f72da60061c8812e4f04b85096. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCJQG2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950708614f867a24d6f9b38b5e7e7ca108bdb10fbfc7cd6eabe673e75e13dd13. 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/BCEK82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf27d753898737aca1f45b8bc0cf61e3c629944ac27659fa13de47fba2b7f79d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCEK82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95a5c50a79ebfce11f034a0fcc06e83351790725fc12eced8a86e1ef360ac62. 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/BCEK82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b2ae8baa9330c3cff49a31aaf8fff7b174330c8f35afabfd20bc28c199ea8. 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/BCEK82300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418fbca783bffe1cdb0e08936ed9768295c446a88c2ee873d2a2731299d43ce2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCKWD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816685e15801d08abcb08ff606c030a4327a988459bfb18d6c7574c08e3e1916. 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/BCKWD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b9868d048f579b99d0f4e584d4a213123c88f255fce4fee96ce42c2462b78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCKWD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b6dec5de8cf2b18f4f0c0f61d6767a093ce39c4cdebf55a3170119dd0e125. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BCKWD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44aaa1413b893a1e91c9ce52a4154051d5f1eb7725c7f7e2e124c18ec30cfc3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BCKWD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1db6d3537a63a93706ad7124f05e98be9137637b00c292ead71fdb006bf89. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BCKWD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7594873bb4a01b1781c553c607e56f74f2e61dbd6a6e82e64dfca3a222c47f. 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/QZTPX2279553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f0672cce14fec22e336117c3ee49b957ae549a4e035ec6a3ac711e15fb16d6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTPX2279556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d02ab938c55a91eb49377e6d9f8a1e035957ab187fa688a5cf28b42e260f88. 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/QZNJW2431342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69df6154923671e41e3bab0c94222f215a8ebdcb46cd5b5df605f866557be5ec. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJW2431344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04afa29032e04a88a37ecc93dfed481d4dffae1e59eccb5065487a4995f7c7e9. 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/CAHQJ2546815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e05d1a8e7bc674c842aa63f92c0984c6f0ad58a90c33ce6cf5339fb2ae3db10. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAHQJ2546816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82ff41850f6af8b13bdd903144d24c68b2778b5c52ac85f225f83a91f844776. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAHQJ2546819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488fe7a4ce26b0060c7f65019485f8871350c0336770604e205ec9347ebea5a. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/CAHQJ2546821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0c567f6e9c722060ffd9c56d061ee37090a127ead55a0f85e600d30d63155. 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/CAHQJ2546817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e18db0e79b72da7e36c2fea9fdd7ff0de89b4727536c87c2e227e5b90522e66. 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/QZW9K2495716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba237dbbf14a994f9b3f80469c9c26ed2bf86d4a5f43f30e10b115cbd487585f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BK4FL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bb98258256700686b3e2961c104ca606006e4cc0951f965fbe070e187d61f9. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/BK4FL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdacab7f5f78358eee93b754f194e5a66172cbc24beb13db14285ca6d611d77. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:56:52Z), 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/QZW9K2495718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae94715e28a545b17b15aa27ffa72c9d1a6f7ef6fd289921850b8e06aa791740. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BK4FL2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5938e33c15a26d956d73274f5e2fee75c12fbb3edb3e7a16ef001bc186c447. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BK4FL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5bedf85f7fd40cc154a3fe30ff93afd68c554dd479f3d82a1a22438625158. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:00:17Z), 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/QZW9K2495720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa8c0324e9533a6b24968be3cc5cc65a1e18e7148534b78778e1d64700a99b2. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZW9K2495719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9567d0599cb95ac2abe41e6ef833918067cb90719f15a38b51eb757e0373115a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXVXM2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8c79f30b11dd617a0f2962988552bf7fb378920101e0b9604c19433a31a2e. 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/BCNRU2400010.