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 0x0d64b7a3c5d38d2f2236d41bf244ef4786659b296743886b8ed43bb933858754. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d33332f-8c71-461c-b15a-9e1e3cb9a7fa.json and https://artists.proofprofile.net/proofs/artist/2d33332f-8c71-461c-b15a-9e1e3cb9a7fa.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 0xbe39b3b974f1acb40dcd5e29ce3a07d289050adc0f71f2e14cbcd29c422aedfd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:10Z), 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/QZVEM2399406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dce744324585b5d5515ed72d6b9c997ebab8641ed343319c45c5165d328f11. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:06Z), 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/QZVEM2399407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef59cce4e5acec1813e00dd41b9092fa6cdd75a947a8b2ffc11947789a03cff. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:41Z), 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/QZVEM2399408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6403587be9c40c4f5190ea30db9240c1c3fbbc9d39e1077b45e9ee7cc764c280. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZVEM2399409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acab7514519394901f54f5a82d1f2270ad84af40ed7826bf50679d73c1db740. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZVEM2399410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d01931ddc9a108f2e8a527213a567115e95da103e230916eabb89dfd058e8d9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:15Z), 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/QZVEM2399411.