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 0x9a91e7e816057e7b4a7cf7375aae29af4e636324a569d56e024157c51ed382d9. 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/ba10c571-f50d-43de-b7d5-8d181f322d11.json and https://artists.proofprofile.net/proofs/artist/ba10c571-f50d-43de-b7d5-8d181f322d11.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 0x81e838e6843e8144f9b62ddb9791161c13f07fe97b35e0b1f7cdf708fc665d37. 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/FRX202278351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1294ee5b289579bccf05413e23710294bd460c8a995e34c0893db66cb268b120. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FRX202278352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a36357797d8ab8765015f490b69a395c60167ea20c87708979dd4fee62ec1f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRX202278353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d384381c174c3ac6e8290961ac270e06a81d5da435b345d48b94e2f02569fa. 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/FRX202278354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb41ada7dcc2bca9a1c05781ee1bf9c072cd26aef89999806642aa0c60ebe21. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZGLS2313908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c16c5a422995ebe2144e99938629de9ac841d646f4d1e0ce262c9ead7be704. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZNWS2287050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3577bb1a8bd4a077285377c85dc9e7ece0b13d2b1fd0c8795159e3e6f534278d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US5ED2202314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ca8e1a602ffee74347590c0722b49a5fdd72959611d70800b1499a99c72d4. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM4TX2084797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb464097d8d802ed70bc586ef4001b91c51851a026ff0908d9ce2bce13a4e289a. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QM4TX2388885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc632f7ee6b017828446f707ae21f61f7179ae90d417df8c40f26dd92c5dc69. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QM4TX2388886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423b1731d3f456774d10a9cb09ee07c566c5e3678c9f3f4e9736ef60fcc9548d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2388887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf373bbc045773dad40d0647de9981397d49324257e067800a83237b362f7aab. 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/QM4TX2388888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d75bc8b6a6e969507acb3037adbf5dfd3e177436654475ac97a161369c9750c. 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/QM4TX2388889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9043b62986fe74a89aff4ceb10839570fd731cbf1ef8570dc03623beb67651. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TX2388890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f3535024ecb7f64b82f8360211f6f2f7f6eef2c72a6931a3f5bc89661eadd. 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/QM4TX2388891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d75bc8b6a6e969507acb3037adbf5dfd3e177436654475ac97a161369c9750c. 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/QM4TX2388889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423b1731d3f456774d10a9cb09ee07c566c5e3678c9f3f4e9736ef60fcc9548d. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QM4TX2388887.