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 0xf77c1cc0e1854c5266ee8072cd6cb8a2b513141980cfdea91d43cae4a32406c4. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b45f8c7a-8a9b-4b1d-b227-9fe11f5245d4.json and https://artists.proofprofile.net/proofs/artist/b45f8c7a-8a9b-4b1d-b227-9fe11f5245d4.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 0x967fb7f28521e7f7f826a71cc60dbbfee5fa0d1ca2da187cadc9cc4ee0097513. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:00Z), 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/USHM92476507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7995d3c2af14cd0dc240c28dc25bf2806e434e26aaece2e419e8b08d06839d1. 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/USHM92476508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54df157aed1dfff9a1f36a7404e828a3dce0f7f92c843a06bb035f957dabd74f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM92476509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78f107936473fd2f41b3e92bff22c1f558d0713ef56881acfcdb99c2390c907. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:02Z), 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/USHM92476510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769137e21f7bd3ac234183d50a1d6d727ab99d12a7389597d7207e196aea4c99. 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/USHM92476513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9bda70db9a69179b23a3b1593cebde343083505cd966677083cd56da67377e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:30:10Z), 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/USHM92476514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2b8ec42f9edafae01271a6eeaa1ac1aa4ea1936b13da35671c0796fe0d2236. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/USHM92476515.