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 0xc83d72b23b0032c4b5e20428d8d971f166fb8b2a2656746fbf109c05bfc62363. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca51fc37-2439-4dbe-9ac5-70006dbaa98b.json and https://artists.proofprofile.net/proofs/artist/ca51fc37-2439-4dbe-9ac5-70006dbaa98b.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 0x705ef15d75f96f474b657ac49ed6686c8f1987eb66424f9424c682e079fd8c09. 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/US3DF2457428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5956aa0c66cc6d9f78ff31a882e7a2d23feb8dc597083a3312d5f5f970ced8df. 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/US3DF2457435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f7bc526d5a06c8f3ab28f15de0e352836a67e5ff8c03be38f683faa53a58cb. 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/US3DF2457493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8926a4e4fd66c7efccf87d93d9c464b88dec2b94978a4726715b031ccb54d00e. 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/USANG2429899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b43d70acf5f118804510e5f5a7cc90f5868feed1876acc5d8b6f6f553a2c7d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2429866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c166c898aedb42540a2fdf6f7fa67b57c5bb1a660e0a6564dca158ff9bf073. 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/US3DF2457487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0bb4cb75fd7240618fd98add40a2934608de58a56dd601a9e9b9e1e5f1cad7. 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/US3DF2426402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26a5ceb03c9972bd59a130485cbf1ecfd2e881e807c1b3a49aa9e14e36c90b8. 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/US3DF2426403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a78f6876edd4ae69306e9e02ceca34235bd01a593d711c1db30dae366b4692d. 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/US3DF2426408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9168ff764d6c4bd88fd7d1967132bcbeb6866a2bd8089f0b20e52a53d2e29293. 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/US3DF2403668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5e8a57a9f67ac1eac14e18eb6339bd3ca1949c986c6cbf85719f24de281feb. 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/QM3DF2295155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15826957445839e458c990cc5d8308664293944b2d9b746a3adc6c77d51efbf. 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/QM3DF2248579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780ff28445456a7a5b0b71860ecb40cb6b8cd1d199020b47598bd0d3bb8a057. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2290196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866b5349b755ee743ff09434d8dae6f3e037552961929a11b8cc38a7896b2bd. 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/US3DF2546576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e8ad338586d554ce485cc9a47b2b566ac0882a556431970b4bf0be4dab1cb6. 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/US3DF2563325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cb99666ee085f76027ef97e14d5955d9dca9094fe54c8763d2000da548bfc0. 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/US3DF2579603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7aed396e851410858445d4170b60401b5665dcd137de718e204ec50effd518. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2579604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1db1f695198f49187a3d8308eedc4f2191767a4897225e6fca00c3fcc3e78be. 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/US3DF2579605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf26522befd119176f6e396d7947a887e0cb91112df3e695b2275df31a502e9. 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/US3DF2579606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e8ad338586d554ce485cc9a47b2b566ac0882a556431970b4bf0be4dab1cb6. 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/US3DF2563325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866b5349b755ee743ff09434d8dae6f3e037552961929a11b8cc38a7896b2bd. 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/US3DF2546576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe416a10dc435239fe91c94a3fff8511f4a98d2109177c4179254f93ac12dfa59. 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/QM3DF2421621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b47f323036a20b126d04e9df12f002306182898f3af8f5dbd5cc68f6423fdd. 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/QM3DF2414634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d527b9032c0b39bc42ddf220df2cf5eb2441ed3dd7743f8ddd5db4387f79ae7. 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/USANG2498852.