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 0xb8d9aef81eafcb12aaa7cc7b7d2bee61b6367effa4ad0da679e43556ca54d49e. 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/123d202b-0171-4530-9377-4c6facfdd640.json and https://artists.proofprofile.net/proofs/artist/123d202b-0171-4530-9377-4c6facfdd640.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 0xb4d6fa5ed6faaf1e2105ffc1ede577392bdb71b362c88990f4cab5554499b72c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:34:23Z), 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/QZNWU2280416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3473c77959771396b5a768ee7e12f949487cb929b6bc7c869bb99d94ca841be. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTB92358267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7433d761e4db9501f53e8e73ddf3185164fff285291c6cee7b9433c98fe5d6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFZ42402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c4158641e2346174165ed7c0810d27c253f09d72e2308b0f7c098789c8765b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWU2498644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5a8a0ea6f1ec1df83e7b58d3680189244bdc62403c4e3590c74d02bcf04eb1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB92494396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164aa2a8d03d352427f44e1df13d25913b5f94d82cb5a7d49466e416dc2b5e06. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6M2485332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7433d761e4db9501f53e8e73ddf3185164fff285291c6cee7b9433c98fe5d6. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZFZ42402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6a302bb56a738537a91a6225bd3dfa5d5a5285029d9a1ded114ea1e3533947. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:05:46Z), 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/USUYG1703868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5a8a0ea6f1ec1df83e7b58d3680189244bdc62403c4e3590c74d02bcf04eb1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB92494396.