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 0xe65f665a8eb5956fa31cc729631f0209495e3f407c4fef9cd6e76a92022fca0b. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ec12fa6-fd35-44bf-8244-3b6dd6ee201a.json and https://artists.proofprofile.net/proofs/artist/8ec12fa6-fd35-44bf-8244-3b6dd6ee201a.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 0x1e4036b30099693e2e4dc07c3685f298db443b65d728586fe17b3b509b910d81. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:48:15Z), 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/QZMEQ2044452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50872c82379e4c92d620a86d030ca2665adab1ebb77f75442704b48f681cabc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEQ2044453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e1be81a0d2924fccffb0d4057c0f1174d8209cd23c481a398f486515ac9f0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEQ2044456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3735028f23b26971b3bd428ef50252b3c032b66323679a6a9d7b73f9a12c12. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:27:25Z), 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/QZMEQ2044459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2782ef23fe5afcfe459f88220e4aaa4aa786835116dfd1f31692ebca7de692e5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:58Z), 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/QZMEN2599609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2d79ff3a371f7db306216b2fb928eca8f68471860f6ad01ec3320ae866a08f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:53:43Z), 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/QZMEN2599610.