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 0x404505339d8300b1c7d98c97c03487f0f0cc0a665a679aa1a150beb061f04026. 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/dbfb0f1a-ac3e-4317-90a9-871c6c97428d.json and https://artists.proofprofile.net/proofs/artist/dbfb0f1a-ac3e-4317-90a9-871c6c97428d.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 0xbd7fb32b6041af635e724e5863e04485d7b47dee8cbef951784b077ab2b2ea24. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:36Z), 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/QMFME2128154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e13251616d3ba8a6e0a096eef1d3d4c2624b06be687674bc43d1bf102aa2b77. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAN112200831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf514dc19a15b854e7a54d5846402eb3b337202b4e0f305e6cd52b8acc7322b6c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:18:43Z), 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/CAN112300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3341c931e68ed8626c99bc88f438c93ed7c946f804d2af237aec95605ccb27cd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAN112300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5ac6f5749d70567507f234ad3d9ede31d7e15895a21b913970e14c3feba0c2. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:27:33Z), 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/CAN112300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317af53548f97eaceb84f453a159349bdd35040f8d01de8120c2d8d3d1c3a0f3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAN112402409.