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 0x06bfb61acdcc7d99a3a68af293621cbfa02178ced00bfa698b71c774be34f028. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/655ae7e6-421d-4188-b904-ec8ddfef7b66.json and https://artists.proofprofile.net/proofs/artist/655ae7e6-421d-4188-b904-ec8ddfef7b66.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 0x5c1e47a0f80e104190ed9615923c6113810d9afc663465cd8fd90355518194c0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAT2346376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4a0723e169a4c76548828f8496f687485d781b3ad1fd0a50f27d0f5314b81b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWQ2463156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a882153a6128675cf358e9f4b5852d9bf89e653cb525df66c4d75dec77bc3f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:36Z), 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/QZES52534542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca5f241012093fe91d4d5719ee37ac11f311175e1afee11621027ef81ab8a5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:32Z), 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/QZK6J2572428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4036627eb743e3491363e480a47df935ade58bc5a64ac3f8c5545da274d6d6bc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:23:08Z), 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/QZNWU2582112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfe3efc2204a3b28cae18d06df14130d73269cea3b5e9441b41b3b58706335. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:50Z), 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/QZRP42505922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1021435ad283f85daea1e6c758dd2ecafaa6e3ba069b62d823a01b9dcd3490. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTBC2537465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c08bd74f689ad35555f5cea2591ddbc6fd6ef7f0cf527e12a9707e628de296. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFP2559188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf107ac240e0ef0f174f13430123788bb19b6c6212633d29f54dc5b8d4b239f94. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7X2565981.