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 0x8fb07cee5cf8171d97636b759cf1e66556f3835dacb865918b5ca42d5787a238. 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/bb751268-7e7f-4d82-84f7-14ae5b0de7ca.json and https://artists.proofprofile.net/proofs/artist/bb751268-7e7f-4d82-84f7-14ae5b0de7ca.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 0x752566e073a3b3a2e799490f49ba2cbaed16b77c9b67cbe59ad27aac6accd500. 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/USHM90631521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e7142466357faf494bf3a7062e872815a767995aa54110bfdb9e057e0107b0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USHM90631522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77781a25602e2dfe34071dc65ee37ad876d45dccd8d663ef216f0a3e088b3f6a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US95U0900913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792bd62b8b6247cda2edb1834260fae8fa5a73379613d7a1572840a106379c2a. 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/US95U0900917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c322ff2940c78928c07d19fcbbfa2f171dce5d44ad8989b699d63b146111c47. 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/USCGJ0903988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20183f6c52e01c15fce95e60b1e4656af66ebf4d89d4c85ce758638e2149aed1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM21178572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928f45cdec3835cc983b107289bea75a48f11be56ec51480033e0b05077f6287. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM21178573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2e7cc31f510d629940b76e4aa7db16b988bab63f070da22c22116c9cd32d6b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USCGH1411947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abd72540f32562601c023cf2bb76fd6d9e8cbb52ef01961fe6c7f1bfa7a9eff. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:53Z), 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/USCGH1411953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356b2529f76efda0e181b2dc32e3410ac1c9d6c04e63be7cde29f8eab4495cae. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USCGH1783135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782de2dcb3dada26b73a8724b1498919bca057c5de26b6bd9f42e0077e4e200. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:22Z), 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/USCGH1783136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fd62f7742ffe4fdc59217d65f55fc1c29e3643267ad0c338358f3bfb86a50d. 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/USCGH1783142.