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 0xb18b66cd471d2a390e254761ef2415027275a9c359771274556c660fb7072dc7. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba10e26a-22bc-4ed4-98a5-3f9d4464918c.json and https://artists.proofprofile.net/proofs/artist/ba10e26a-22bc-4ed4-98a5-3f9d4464918c.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 0xfe562e4617919e4933f4738e7a459905ca71ee089a2f9654be32e6f329f26c5f. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:27:10Z), 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/QZNWZ2147596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9ff1b5d91de73433a53058fdd7eaa3feed3a14526820f29ddefa022af9c1b4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWZ2150338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d69cf60ee550d48f785acfadca37b52ab8b43cea9fff3629d60f15b7f6ec9eb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAT2260070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be35bdd2eeca7d4d6e78329ac0bd9eb0a7f4d980c9b59fefcdeab3684c4f2bc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:23:51Z), 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/QZES62348804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caacb06820d014a9b727f84ca2f7f501c3fde6c991690e28558a6e1e308cc50. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:29Z), 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/QZMEN2353723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66934d8ca7fc9e1d94dd26054c572f5a16ffb0695589a4c4c110d153214d779a. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:30:53Z), 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/QZZ7X2435583.