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 0x1e4eec6f3efcb6278bfa3976ed4f1a6dda2604a23c66cd0b9c8eda467dc22869. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41fd7fd5-869a-46a4-b3b7-9a184a5c327a.json and https://artists.proofprofile.net/proofs/artist/41fd7fd5-869a-46a4-b3b7-9a184a5c327a.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 0xcc4f8b14034a039f6bfc5c7a59add05ef00aba5db346bdd99c70f699571d4dac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPEW2527246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba29f952ab0fdd2317095a44aeadd1f122cbd9c3caaa5cfe4beb91c5400bd196. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:46Z), 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/QZPEW2527247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a959c9f21f0bcea546323f0e16c8eb70fa55482fff750f40d475398cf99e264. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:53Z), 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/QZPEW2527248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319fc8d61ee356aa0ac67e4e1df31fe5e4b599f2a09779f525f73ea98bde968f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPEW2527249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea72b9824ba66eaa387f22d3ba9b696eaa5fe17048622ab09860807766f6c1e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZPEW2527250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1577806b65188ea08f2b672c0cfb64e0d29286ce9b43462f6928fce2e83f02b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZPEW2527251.