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 0x91cb2d7fac612f6e66bcdeb1cda2ccf871b0601758587319f2a0b99dfdb2d14d. 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/bb87a665-8fbc-4832-8b52-9b5a9b193733.json and https://artists.proofprofile.net/proofs/artist/bb87a665-8fbc-4832-8b52-9b5a9b193733.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 0x1cb0d6b8576ce3543a25e48e418f79930d7575e5cd6f5a25da076a1a89b1443e. 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/QZNWU2125605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fee2ee059455935948b854148c148a7ba54416e96bf628aa3097a6d6ff6f21. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWY2104030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707ec00d10443c1d5a2b7f7d3b5d405f353b3f1db9de4bc5cb6165340e141842. 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/QM3DF2189875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccbe4d137ac5108c65aa26c0fcc668e065d5ca159c13fae5cbc60709009d29e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:15:33Z), 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/US3DF2216884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6fba9f25a2d2da9ffea01f9edf5f83cf96eab979b70e4999ed858a36a98466. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US3DF2216873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af60bcc7528bcd10235b2da6ee04500392efc873a186f8ef5be6ca353eb3aaf. 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/US3DF2216863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681221ba6ac7d4af4273887641f0c48a16b45ce9347880d18d8105ec3ad0c143. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QM6N22297369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3add5923e8e00d604922b420710d7af8102efc48722f5968578fde51906d93. 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/CZUM72400772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff97298f96e145b6371fc384c6cb79025a032d3c2866c88380439a134cbe9a2a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CZUM72501050.