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 0xe5679639f9a5efac00bbef5b9d2a0382f37fe0f0f44916c1e2528dd5fb2a4af3. 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/59297fed-302d-419e-8cd7-5fc6acd55687.json and https://artists.proofprofile.net/proofs/artist/59297fed-302d-419e-8cd7-5fc6acd55687.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 0x6ec3fc3c7af92dc2d0aef066aaf1167003c5ccba81b1d1fea8a9b650acc39ecd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:35Z), 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/QZGLS2474205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37094ce92d7bb1e97c9941e4fa3856ef57bdc08632160abcd182842617bc6b8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:01Z), 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/BXIV82452981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75581438d30564cdf318d0316086e307e7d32475b0d83518134c7372a8a8f5a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BXIV82409645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ed4990efad7b5eb7b0fc7840863393ac2b88b04d45be466f0e2b4f683a61d1. 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/BC6M22433025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f719a5f2771c5181abbf1e06c49818e6add250f6f7e43ef22725f962a060549. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:26Z), 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/BC6M22433017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87b77d72899f580c23779590b5f335121363471004c24ea577e74cb88feff4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:26Z), 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/BC6M22522060.