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 0x619194e6f03f8a242472ec99ea1b78969c45c2ea2ef8466259150728dcde68dd. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db68a86a-4a7a-4c8b-ba83-27f6e15b09e6.json and https://artists.proofprofile.net/proofs/artist/db68a86a-4a7a-4c8b-ba83-27f6e15b09e6.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 0x0bb47080e6a3cccfe98cff1c9fbbea0dd42d27dbfc648522c7b624168d12aed3. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZMEN2059180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca976850eb66c935776df4e2fa90e6ac56b333bdd2bdac7942927eb3666cccd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:52Z), 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/QZNWS2022163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7832a5e21e0716effe7909a253d2f6e93aa9d589e4455c30c17523568ced5cc7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:27:44Z), 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/QZNWU2253541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784cb962e6e3901aafb203b5a8e405b68a30d42746b2bc2cf1a9ad973dd061fa. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:03Z), 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/QZWFJ2428174.