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 0xe63a749d5e49a19a2ea47d25cab113ae25bb9cd6b0d1b7a5a3ede2091cdfe862. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7f3021f-1767-4138-baff-ee5cb484088c.json and https://artists.proofprofile.net/proofs/artist/c7f3021f-1767-4138-baff-ee5cb484088c.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 0x2abe7da65c1de1823eb592060e6260302380fd036b85cb6529d1af95b44b4ea8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USA2P2303452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b05b52d02862db2bef416207b7db1eaf0df5753bedd9a60c6b2996f67b92a. 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/USA2P2303453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f99c4f04917e70d4b9990111c89b8d6b69f4b86afea052a123fa6c8b470e6b. 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/USA2P2303450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643fd696bde47a25661e94d8da42e3e07b23863d0e527d22000cc12b51b96397. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USA2P2303455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb60ff1fa0b323a7831a9817e15ab4aeb460bcbac4a633504ea9e115665320b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USA2P2303458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129828534a405892497035ed0f908a7e805b78bfa59b85a3a52423ebe9506085. 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/USA2P2303457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bb3da1c991e8af06d5e25067a56fd3b26822740fc5edc367c50e6b47ad0386. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USA2P2303456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453f250a6e74d6f25efffdd70c2dbc13ed6c5df2f5f5559e352a8472d9c438bc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2P2303451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9c7b4dc7d320827b869127a9a15b293033f2072e477bd60daa16bc1f11375f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P2303459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70098ee8afe77f889ae72937687208ca6f83ad5961b7944b78d42ec376aed26. 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/USA2P2303454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca064f633d415c132867a23ab04ce536007689f6e1498d3a35c9cc8597df543a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2P2302937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906ae81bfd176b8f06340889ad596a875164c10c37cd45ab377f1f5cc183ef62. 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/USA2P2302936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555087f4f8fbe67fbef5a66336ba3474f9232b81a7fb75d5ca7699cbcefd8596. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2P2302939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e6925ea21d2b872df80185d4bc50b7e6473c3025ad7824f83538f7e897138. 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/USA2P2302940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985d4fb258460196099baeb391f55de12ccac8b4239ec0b5a114ad484a896c9b. 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/USA2P2302938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7fcf701ab224dff309a83f9d1a75792bfebf91bcdf086218ebc990a7c5e8b1. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USA2P2302942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d7bf99d04f66c02eb2cd25ff44da1e91a3d6ceed308e7c120d0d421d01c10e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USA2P2302941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9552bdd9032ef2f6112098052efad6113ac88d910e3a067eb304c0e618711b5f. 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/GBSMU7772029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94478e62148458dc46aee9c8e45230eba2926064103a91aafc52328c54c04f8. 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/GBSMU7772030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7901af15cfbdc43f72c6d5d6b300d27123474754c61329d10a03dbfbe6962ea5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBSMU7772031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dc08366c33b64b99f00edcde4bd72f27bb3535c2685cc114d92f762105c8d8. 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/GBSMU7772032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd273a213acda037d7e17b5d2d7818b27c3fb1c8da02eed9926c3c8ec0387eedb. 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/GBSMU7772033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb775329dbd175e76160b7d1a9fee692417343ff1f014c02d6fde981c0ffe0d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU7772034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe67182b65bda6b1ce67e9fd6aef3358bdb8512605f91265228bfb2bdf187ee. 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/GBSMU7772035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf10707f514ba9991b00627b823e5a9f8dab44791d2d570b76eca4c23378e4d. 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/GBSMU7772036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502fdd3c8d32721cbd8cb8c94007f442b82e57b8985210afa271941376d0c1a2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBSMU7772037.