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 0x1f641263d7f96ea3c9a019b3fd65223117881285780f96b60798372706ad1ef7. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29d6117f-ed0e-4b9d-9977-5c8bf7a2d4d4.json and https://artists.proofprofile.net/proofs/artist/29d6117f-ed0e-4b9d-9977-5c8bf7a2d4d4.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 0x594af692e9d2c3ef09571e653d75ce6ec9ddb477bb739b8e3c88aa68c2d4b27a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKEX32529473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8926443826cb8d9a084e4ab0e479184bfc545c37c41b64033a592e6f52202dde. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:21Z), 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/UKEX32529418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31198c8173a3837f11d820d68f86aa696c83cf61e02e523c47926e958758b1f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:55:15Z), 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/UKEX32531892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b05a2e5c77a843d4847486a1f38caf75894749426c101625ae07130ab1b7c9. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/UKEX32531920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b5a15009a620a017f19468d677c8ce369f207c93585e75f1a591369e4daa58. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKEX32535650.