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 0xc85214fe55219176c90bc8d9060e819d5af3480bb2b9e780664d5ef7fd8fb9ba. 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/71932b6c-79f3-4c94-bab1-556fd08cdad6.json and https://artists.proofprofile.net/proofs/artist/71932b6c-79f3-4c94-bab1-556fd08cdad6.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 0x2be19dfaa858a41301c7895a5391e3ae48e173148cf43ee38f8dc42fbccb19b6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7K2407766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb45c797a73921d39e57db58e01e84b72537873d8af3b5819d290106a4eb920. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZZ7K2407768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34efb715ea92fecbebc831e21379fca3a21a3e266a3adc46aafcba719af9072. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7L2468278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a0f8b1531035fe10ffce81dbb5b2fe0c253bf768c058e69f445105aac35cbc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ7T2449589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6724fb076934a516b5b4f8bb91ac3fe6f96797d8d241fc5bd995ead3bb5d66c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:21:20Z), 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/QZZ7V2436134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6592395765d43a327ae4030ea7d0106e5daec00435554adce5c5bf462edeea0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZZ7V2464097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5400c6ba44b6657e1a17513b5032e4a5fbc44dc11dcdbac0c431f9981907c2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:33Z), 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/QZHN92556120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4917f6dcaaba96888bee539cf3156a9e692efc448a2c6c678db0487f6a0b571a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6P2500516.