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 0xcd37f9d7b5f5b9ebc64ce5e3a54115a58a3e3ef00f9c258d8d9670f2e3e3cae2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ee486c6-c75b-46c0-8816-cd2bbebe3c69.json and https://artists.proofprofile.net/proofs/artist/6ee486c6-c75b-46c0-8816-cd2bbebe3c69.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 0xfe4641aa6ece7fb2dfcfb2f29887e3158029e209b4633dabf9f5dea8165adb13. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:52Z), 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/QZTV32586190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d440607325a32f4bc030d5bf112a1786d3ec975bea9f4677f4b934ce87dc94. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTV32587086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c7258f11efcd3b5e2522821ccf309501c0b53f5b55d77d2ffb0336df70a418. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:02:56Z), 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/QZTV32586986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0dbbb462fad9bc58fec78c327cf113894af912f1bbddd200d8f2c69d0003e3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:53Z), 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/QZHN62395718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5765cc0fd8f021fda342e304411506fc7d3dfd7c7709c204e2c85545fb5d00. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:43:36Z), 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/QZTBA2436483.