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 0xbf785d0c90b3b50dd4b6b13e97abc5d4db2fd88d46b72b0c3ceef992d8e7efc4. 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/e880b620-d5bd-4147-96e6-8075fd6f3874.json and https://artists.proofprofile.net/proofs/artist/e880b620-d5bd-4147-96e6-8075fd6f3874.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 0x2d056808c4e4ecee706edda8017fa2b77a9bb54f0847477568db30f772c0cf9e. 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/US3DF1717252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639263e4ba1d4d199240116a6136ac37ce93cbd5dbbfd9fb4afabe7288c04d8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF1717253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80ce8bf579862446c339927a6250d55fcdac6c476284b77ce43740976948ec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US3DF1707464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3820211fae7efd80391d32efec32a9f146d6cbbc0d16b80e5e410aaa1fd492. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/US3DF1717272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd357498bec60be6a916b76b5525e695da4ce9825f2fb7c75ba04ac061a0edaa6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US3DF1717274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efc4ae6b0e591b4d88e8a8bb90023275ec8cb0940f6fd88541dcbf84e63fbf5. 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/US3DF1707389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658170bed7f4a9bfda7af1be4b487e09155f22228985ba38e70477174b5d1979. 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/US3DF1717270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e560c1f61b1754caf057dbf094a4ce4173093fea66650393fd0837a7f4e8ab7. 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/US3DF1717271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb750a499963e52b7e44b645317bbec9762025f71718094b378e151088a955b9. 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/US3DF1717259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52da698d0c8c6dde65ab133d43fd37cddc6afa9aa93fc5ff70313306f9cbd4f4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US3DF1717260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fd67c4b348113641e51e184346859863951c9d12e10bd5baa20d593a813376. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/US3DF1717261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80805a6dd18d66c73a74c138504a47b63e094a058907b616365d6c341e3d9ca. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/US3DF1717265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe50312f8cd7040a361358e0eaeaceeef897e4b26590514e02b14f03f8c6902. 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/US3DF1708796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a612a68bd879d602365a135cf3e63aa218468bae4e5e712814ad8aa8a11b3d5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/US3DF1708797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3274473f6317532bf311cdccc72eb7027bdee237f6711b172c781afbf3ad7a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US3DF1708798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb863cc39e327738742b96ecfc6d198d091ebc06425e8a0d4f64dca12489b98d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US3DF1707386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b11067af83369f8c273f8d1d025415c059f9b12fddaf680da2cff1dffee0c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF1707388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7162f051dcdb6d853b1d26bf3b8f207e171b1405db8d4c4f7fa8c958f4cfcc4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1813494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff077c3ec0496f08c83dfcf9266b4a2f88152b725bbd53f46a6541cc538cc66. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/US3DF1819707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c9ec472e67e1c4a40cf5315b07820d827feb9b4b6fe3073b74bcb335561355. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/US3DF1819708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b3d5fe26c48161bb5ea2ddb214adb4f65e364613b925bf6952852506857997. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US3DF1819709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfa4fbb2398762d9dfaf1553587711d7078a7e8bd2921d08f68f861875adb2b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US3DF2016319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f9a7d90a374e236bf283ec9ab30cfd98fe6d56e0a8e8e7e67c75a6abc45053. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF2016335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61037199bf256a7a6f08d048d71cf60917adf9579455b66a6f41b30f1908268. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/US3DF2016336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9add8ed56867c2dca6009f2e7f8963a43b5330cd603d550cbfb51425cb9b6f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US3DF2016337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a633d824fe9d59d788236784993daab095079bb73cc50dce391b36c45aeea. 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/US3DF2016338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18665b338057df577229c5e4c9d4ce33e9587b18adb7a93a50a96efb244913aa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2016341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e9eed0ffa14f9f9f8d5615588a75b4516f35d05523f308864ca71b3f17eab6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/NLHR52153728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c873aee81a8a0b9856439463a3aaa319c50404411e7e96660fdbe4f8550720b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTPX2509365.