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 0x7d48c69c65ea80d5f4eb8cf00a14aae8f86b10bda75b7bbb0f8045b50756fb16. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2389ff5-7666-4d6b-a09c-3d99690d7f66.json and https://artists.proofprofile.net/proofs/artist/f2389ff5-7666-4d6b-a09c-3d99690d7f66.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 0x14f450d86b3e6d875d756eed139bdcb44cd2ea7e3755298443cc6f18f13af547. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:44:37Z), 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/QZRP52495813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49fcc1dab6eeae714369c1d38a489fd1d76c9a3e3ecc2717376163c4d2f6782. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTAU2468156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed24a52a545f32dd29d622e47d6b95d5bb86c6a7342734a0c8b7869e73b880a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:58:01Z), 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/QZTAX2457228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d163073d669ee212d8a1d6939e0068a283755064449bf7f1be4a73efa8543b5. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZTAX2457229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2be6e7ecf7ab461823eb7a4e5c61eaea35a39848aded6ad033a09c4713c522c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTAX2457252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7945289ba16bc5690427cb1f351838d073a69e62654702682809258a6e31401d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:43Z), 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/QZTBC2485073.