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 0x710493b9a5fb68c87c6fd8fd1b83c6e6baf6ae0cab73b133dbe1ad11eda0be1d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/650f09fc-463d-4ccc-acf5-aa74bbd2c0dc.json and https://artists.proofprofile.net/proofs/artist/650f09fc-463d-4ccc-acf5-aa74bbd2c0dc.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 0x09417c5fb5afc2b09d4f7d1062f84186f4ef00bd2a8dd7ae37c41652aaaff9e2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHNB1946914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754877465b08b8f197340599fcec5028a941b3195d48176879a9afda5bd3659. 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/QZES72504062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ace5c6db76f1d0a97c815740ab0f69a7e2d0598dfa5db885fdc2b05a331720f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA72517222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754877465b08b8f197340599fcec5028a941b3195d48176879a9afda5bd3659. 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/QZES72504062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec45f44e5dc3687d9909bb4c42f445605a563b8494c125387909ac77c250e65. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFYX2505964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c94782eb9110be68425fe58e39127905aeb790d4262059e2e0be9168de8a9d6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZES82542539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7cb67540b1f9f80d990c0e8699626e0a38ec2b37bb22303cd7d6af752933d8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:16Z), 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/QZES82542540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6deeb7fb24a0b21adec85832b48b227a04680cb7397815dbdcd930a1553b5. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:46Z), 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/QZES82542541.