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 0x9f1c8c9194bf79c2fa22c5f204b212de0be6f1eac83519898741254d3a32c301. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff3e10c5-0915-4bf1-b04b-2a9142592a83.json and https://artists.proofprofile.net/proofs/artist/ff3e10c5-0915-4bf1-b04b-2a9142592a83.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 0x0c70c4314e6d8aa08be6e35e63811dcfcfba47fee269827ee6d792fa80a7dbff. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:28:58Z), 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/QZWFK2596209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbbc9d4c73be75feb594ebb3341f5de05a3a914144325347593302bd1792280. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFK2596210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f3cf70b6bf13ad8b3a1821ea1e4bfc0214b787c1c4e363e4d2ee053b250d76. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:06:28Z), 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/QZWFK2596212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad02688ccc77a47be1c0731fef4c30c34b9535e8311f2f22dce84660f2da07a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:22:20Z), 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/QZWFK2596213.