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 0x3613d1cfc0c4033099acc38a154ab4ef5f8be00df29d8d2ab4470d43e254a78d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4c0c187-d5f4-4703-b6d2-703db858edc9.json and https://artists.proofprofile.net/proofs/artist/d4c0c187-d5f4-4703-b6d2-703db858edc9.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 0x690ba83b8d1845b66ddd106e5d8dd6e8b4849fb90a44368cf209c438ad3f1d83. 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/US7VG1645175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58fde0ddadc8dbbb90cd62c264f15fba3ecd6f420d43f09ac00ee46ad2cd014. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:21:34Z), 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/US7VG1645179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592786f82488b04430d7787db99b9bc1fe044c5fbdd81021ea2b6f4e03d94b74. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:56:35Z), 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/US7VG1645183.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099be995f02760f0f92a0a37b28a37c2135f8fc6db650e5066e0d40924b39d54. 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/BXQRG1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22756b2b5e923aefc347d18aa157f5010ec49517720311970c3eb351983b27f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:25:40Z), 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/BXQRG1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9dde01a72fe985778b9668ee6eae6639ee4f81930236ba978b270b6f1e8450. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:18:27Z), 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/BXQRG1800007.