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 0xdee7c8774ef660ad3c5d9c9c7db7e37df2d7cd6dcd52eb9e27a688f6e99a37a5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4f259ab-bee8-4f2d-a9ba-dd601c321c8a.json and https://artists.proofprofile.net/proofs/artist/a4f259ab-bee8-4f2d-a9ba-dd601c321c8a.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 0x2ffb1bccc2a658306ba6a9a9db83151b38da0b0204c00db9bc550c0d39c0b21c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:52:39Z), 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/USCGJ2240169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf042f12c5e0c5a7c669ec4f76b7860bf937b43902dec0ec0fa3231f74e755d54. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:27Z), 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/USCGJ2108694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a6128e6a4853ebbcd55f49a1e773d1811df8754757a64d7a48a889d9f4ca86. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:33:03Z), 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/USCGJ2240149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f6b4f706971d939ffe1a7b72d9a6cd6661279e45b9bb4a5ebd27c5b4593b6a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ2337810.