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 0x55c4a9f1370a0c0a6162781e761485397d6bf58943b7f2dad74c44f6b35abc96. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd1551da-3259-4849-b0ce-64f2fca79860.json and https://artists.proofprofile.net/proofs/artist/fd1551da-3259-4849-b0ce-64f2fca79860.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 0x816407d4a67b464e291737f6e25a248f7c065e49790b3d18bef5712cc59a2443. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUMEV2567173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce4cdeb476fd179729ee2ea82528aafdfd393caa7d87d246825b5548d21045. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUMEV2567174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5068416cdf1faa3da28278c7af2be40d84586b2653507580c1ba30036eae5c85. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUMEV2567179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a146815649cfc70454edb3f0063dee916fe5fdd789661e89cda086f373c4e59. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/AUMEV2567347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02e6b3a5eed7ed44ec88a7aa535e182b4cc3009e2ea063e481d66ca79273af3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AUMEV2567371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ee62471c9706a8ea818462e3cb47b6d5ca6fb425b3051a4e0d55508305374. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AUMEV2567378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bccc2daed946407acddcacaea23d7b2c5426dac13a9281ba75690009bbff73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUMEV2567380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f84b2fb822c1446eef5e2e922bd7b00b3ee472d1fbfa8831bf0b775eb900d7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/AUMEV2567381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77834d58387621b65afce1a6232c5355eb31d5a7004e965df2fb2c87ee8f9bc6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUMEV2567382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b617ec0c532c2bcdd340d9a1edba17100472a59059aa04019dd203d2574cb2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/AUMEV2567383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed204f5240c9e1257251d4b9692f3101343b42d9a629b8eb73f979bd596865c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUMEV2567384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbf8de1d265e464dc1b2abe33e4d52a8dda8bf831edd65b7b82b6cf923d92dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUMEV2567385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cafb3d74a3e5b3d3cae80e748f7da58e641692aea7aff21b583a30e616ab0d. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/AUMEV2567387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbb79b5f664d0370e0ac05cc84461058a2d33078b352997f5d31e47c08063ab. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/AUMEV2567388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c82e0cf77d76d6ef15117a2d30b90c8eca940576a4baa83e839cefaaa21b8d3. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/AUMEV2567390.