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 0x01a74e6ed3fbb03ef1fbfdaf6d8fd8dee0937cdadc4e36c0f57d19d8ad23946a. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8bf1bac-6091-46a0-addf-c5114b133f46.json and https://artists.proofprofile.net/proofs/artist/c8bf1bac-6091-46a0-addf-c5114b133f46.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 0x99c43e6d4425f643ea087c40f8e8af7f6f083e7fa7d0d75f27f1c5871eafe150. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZES61934865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c7a4d36dbc2cad13b8ba1fc968ff527de518474d56c0ca49ec7116995bdf3d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWS2022794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc94af1f48d49da5c99f41e6f7a0f69de9007f623abb43e02d6bb372b3eb47b8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZES61950338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2b18ff7604ac0e503675d852d359ce3c56b374f91677eca83bb63ecbcca3fc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWS2024851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535a1d3158a05c8118eb2a0fafa74522d007280d8fba2e3e81318c30c18e9e5f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:33:39Z), 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/QZNWX2147096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856a1fd9b38f3ae16e4025e528a9aa045a6acd25f95b48d65f251cdc5a6307e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAU2230353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed5c7477333a6113dfbc2b3230fd04098b4bb259a0903a679f74adcfc2fe9de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBE2385536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75f92322ef67a819120f90585b9a5ba275a8b09b561a9a5673fa82fdf566abc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:35:45Z), 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/QZWFU2432800.