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 0x5c8c169baeee2cc42503b379ac9261cd9d2a114777071619a271a6843e1a31e9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ad02afe-d1c9-43b6-9600-416ca5fc0e58.json and https://artists.proofprofile.net/proofs/artist/4ad02afe-d1c9-43b6-9600-416ca5fc0e58.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 0x656d6bd389833913300307598aca7340f5a36e8d2da37c84a497bd7b429d4ff5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BCRIZ2400645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a8cac2f01d157535e2024be4e5f3f4e38cad0822fa84a2dc86fd0ae263ae7f. 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/BCRIZ2400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68daec01ef5ab94ff36a23cbb16f4d04cb0c608a8f0c94ca931c6f21e4fe06f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BCRIZ2400889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8e9af997b90c3c912a4bddd30ac7d746d1ccab0040ed373ec9083ed065947. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BCRIZ2400891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c70519b012a30f3e46e7cef6c1b3879f8b4152be039532cabd960a8fc79e0d. 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/BCRIZ2400893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34dbf8263ae61c0dfa1cc3c49eaede03a8c5cff35fae02a61c1d7e7ec42c557. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:31Z), 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/BCRIZ2401264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107d93373906b378a01c3a15ce146b15311e1cd352a136c0d512428010752c1a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJV2564730.