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 0x4716f1a7e05f71d6ef9acbd545d624219164efd9c694bf9181c99b6f141b5fb6. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba205405-0e59-4d7d-9518-4650a24f177c.json and https://artists.proofprofile.net/proofs/artist/ba205405-0e59-4d7d-9518-4650a24f177c.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 0x49e6c2ad424491f82696cb2d2a9c98ce24dce32777ca5406dd37afb9fcd440de. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM22074532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b65e10a4898ef974a3f2c84b09d500e4bb84b47f37a22ec432a0d1ee2b5bfc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM22074533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff175ed91d51cc2942022df1cfd4c8ceeebe028afb4192752091fecc8e637e. 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/USHM22074534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0bca6f28c2d4bb01dfdaa0193d5bfaa8d03367ba2affd9633cf7ec591a0b28. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:31:53Z), 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/USHM22074535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fa840bf1d53d79a7e73b67558629a2b126fbb106d017b5d14f76f8dfe9acd5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:38Z), 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/USHM22074536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9710abbb738cfd371785fd9d525ca2a3452d18cd3290b91b9251947f4d8f88cc. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:17:46Z), 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/USHM22074538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb46d1ebcf72b6f5909e06418e28d72d80ffad95ac2a29462acb7f7abb7adb3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USHM22074548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6443b3db2fd8d1647661687344013d19a35ebfe84ea716697955aab55e0c4d5e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:25:49Z), 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/QZNJY2125784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcca9e434dc53b2217a2e9f276d9c2c36f1025f16c4535e3d9fc1e100368f51. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJY2125802.