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 0x2658be1d06ee4394114d8c80e334e796eceb1c1f666056af3ea5f70ecc121427. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e92db96-891f-4872-a9ef-2fa43d0ca684.json and https://artists.proofprofile.net/proofs/artist/8e92db96-891f-4872-a9ef-2fa43d0ca684.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 0xdc35af23c2f9f45136d292759dad89f7c0b7760a42952703fd0ce9f12c205126. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:21Z), 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/QZMER2555734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc35af23c2f9f45136d292759dad89f7c0b7760a42952703fd0ce9f12c205126. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMER2555734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db7915c167555bb5de3b75444f5edcb6c125a5e40e506911faa4f0fefd44771. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:29:02Z), 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/QZMER2555735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15b8836aefe5ae08804210a9dea4a94f6828108a1c56b9f1724a77f7954c658. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:11:26Z), 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/QZMER2555736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc115453071e02623610dc61874cbfd7d571f89f1ff6f02701282334cb8b82659. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:46:23Z), 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/QZMER2555737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc666d21ab9e4f465dd6154a4c994cd39584f168e7474dfa017c52212474f961b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:52:44Z), 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/QZMER2555738.