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 0x83db9b6dbe86fe065bf73868dc58147f4f9cd9d24225c821cab0a73797f2bd2c. 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/93f8b561-1c19-4d78-91fa-55d6e829f75d.json and https://artists.proofprofile.net/proofs/artist/93f8b561-1c19-4d78-91fa-55d6e829f75d.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 0x2e27147a4e98ca400cdfd9d893d2aab75955471a5786e912dfdcdbdbbe3af5e6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USUM70601711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a8d06280adb09e3e9976289e00c163cd206f76b875bfd062381e75b9013d41. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:20Z), 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/USPO01700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8e8f75ca4008d4d0b78ef84770ef64af90d739e3f3181e1d8f5aa43807e32. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:45:00Z), 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/USUM70500545.
Together (Expanded Edition) [Digitally Remastered]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb2a01ce42c3d09a1fb1ecc9ad75b12af52bc99e858eb6efd51ce6118b1bfc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USGZ21242660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204a55e8785e2745279e49db9810b0c9c2b31ac071aab517c0fa7794a30fe310. 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/USGZ21242665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbe9423ece8a2112a720aa6ba2ae99afa406682c95852df00f2bdeb413ebb23. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USF067600040.