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 0x44ddb3596b69666616814b72f3e358a626be59cbfcb59abfab8a45ced9ca3e55. 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/71558df9-42fb-4f85-bc5e-a61b42bfda81.json and https://artists.proofprofile.net/proofs/artist/71558df9-42fb-4f85-bc5e-a61b42bfda81.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 0x266249abca23d5465d2e1675b5a1b7dc0f8c25f261678d9d9a8c5c6791cf4c7c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:14:40Z), 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/AUCD01100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069bd36285c46d32422018e85cf6a36ea62059d74b8e33aba83dfd2f081a6d3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/AUCD01100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85dcf5c976a6c12f837533c4aced06975b38df1e0e63fae39cddf8456d92aed. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/AUMEV2014831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772cfc8415b79cc6b9aa4c89109cce9a157a77b13a27d8d20fd9b35817d4c64a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/AUMEV2014832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6ec353b5038e24f5fc0719be2ed66d096ac70ec4b34c529b092006b5906fa6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/AUMEV2014833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402be12801f39f67aad314bec8df6fc64c8e50112f080f9009f7f139e580da81. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:35:01Z), 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/AUMEV2014836.