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 0x5a07137ff61fb091df09e95187c906fd8c7f261eb7efd51fd7bbd002094d5825. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b406ade-67a0-4fd9-91cf-c66f1fa998b6.json and https://artists.proofprofile.net/proofs/artist/5b406ade-67a0-4fd9-91cf-c66f1fa998b6.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 0x757bdc0c6f61a8f66a643502d12af844109eb0a0392d05a6d90e9ddcc9b37b94. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:47Z), 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/ITM172120701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7091699858adc13a5d93e21ecee18ba1dd6e40d1ee3f00591b704f5a0cfafe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IT0312200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fac2750b01c1aeb24487c5114180dbf11f400f8c840a713f6d8c5fa594485a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:14Z), 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/ITM172431701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9173966d6274f631384521a8e8d9b7520797dbcad75a62b0cb1a14564628510e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:53:00Z), 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/ITT4X2500029.