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 0x17fad9c5b1e15a95b37398783a0fe78fc3a1ad2aaaf2edc80141866745d62c90. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84aa0467-4b38-4d71-ba6a-60fce9f479d9.json and https://artists.proofprofile.net/proofs/artist/84aa0467-4b38-4d71-ba6a-60fce9f479d9.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 0x91208cdd6c4c2a5a9dc7093af39e4f8ea2105d8f1d44d20e270477f1dd395a0c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:47:53Z), 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/INM251928671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a19eb8fed193070dbb09c1e52c4f28fa39e8ec6e49101c77c5a818fc00e3e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRS182152891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335efad7074004afcd04112c59b9e7a54209954c1f48458ce9f60934b9b741f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:13Z), 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/FRX452235492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92f94f7ab332882c257f71369d470c889850fad8fb846b6734a411796556b63. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:43:43Z), 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/QZYFZ2517095.