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 0xa98dec802b45dc07ac037338dad2cd89414ac2667728abc97ec4dd77a26a9b52. 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/72b76ae1-dabc-49b0-a48f-f552f4432291.json and https://artists.proofprofile.net/proofs/artist/72b76ae1-dabc-49b0-a48f-f552f4432291.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 0x97de83a79bafb2efd275da92ebe793ebe649088c6526eb56c6818d3c96ddd83d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:11Z), 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/QZNWZ2327948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0fc75baf8bffaa9ee8441d87503f285d4442b7e08467782262baf064aba911. 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/QZES82125734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade4888087ffa226297548d92220bd2a41e5e96e3376d0ebcfc418aab8c0d928. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/QZHN72589760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a8eac4676255778460339c67bbf2bb3202d0437c71f93243cc10076863f442. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZRP42526588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1895c85cf78eb1327c29d9987323f1899d249619bca4cd87bae8d8e982dbc2b7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22560856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f045d7a4632a9b22bb8d9bc1ee2f3f553cc515c6f23f94a17c21f188336019. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTB22560857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a8eac4676255778460339c67bbf2bb3202d0437c71f93243cc10076863f442. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:10Z), 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/QZRP42526588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade4888087ffa226297548d92220bd2a41e5e96e3376d0ebcfc418aab8c0d928. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHN72589760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879f9c0d8ddbfd185f338dbf2badbe7315220cf946bf20dfcf0eb0c998c29ba5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB22560858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e4c185cc13bce21c48abd7d35857b893c00f42b072e32f8d49543147bfd36. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTAT2533578.