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 0x93243f468cb9539de16757ff75ba64ddd5c0563baae51dc8177fe668e35f7122. 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/4e77ae66-4ce1-46ec-9976-c1dda818245d.json and https://artists.proofprofile.net/proofs/artist/4e77ae66-4ce1-46ec-9976-c1dda818245d.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 0x8a2c54d0174af6802d1f53df6e582a40c9b4a31b3a45641d3d4b4e2a5bce00c1. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:14Z), 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/USY280799705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78a739c0ef2f9c37a261ea50df3fdddf06874e9797565efed1bd8d39f10f074. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USY280799707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ae3467945bc35d0c8a816e30da5ed47b5ae3898ed46795a27a82d80c1ba8e1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USY280799708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf48ed7302c11a2fd5b47dffca8fe4b8f44a7c1a0e10463be033f7eeabd31445. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:51:18Z), 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/USY280799709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa9a2671c617cba35e9d4e741c2b1ddd09b15eed37a3fa5bb587ddbee2a4536. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USHM80888241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01416f7d4912dd1e0c838164cf9aa49066004cf3474f98b8b7268369d9cf451. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USHM80888242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bec2426ba1055d15189a96d01e47b293dbc98ca4eaf1f7e49753c900e0ec0d6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USHM80888243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204f8eb3ff022c43c7f1e6195027b80e4b7160613d52ac49d01e2ba602e663d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM80888247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0461b8e0980e282b64b2eebabdf4d289077f6b7b8b46149a77569c138d0f6f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM80888248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27ea7ade72a3235d2f47e51ad8abbdf29c26c04aac1d7ba2e4a0e26215f41c6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM80888250.