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 0x030a76cc6d095ce046a9107cc68934239e161a068118c9badf5d869b1d23aaf0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a489a21-4a85-4b75-bbb2-cfb65656c1fb.json and https://artists.proofprofile.net/proofs/artist/8a489a21-4a85-4b75-bbb2-cfb65656c1fb.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 0x9ea53dd1bc2fb858d6ef72df5f51a0b32ed51617e3358991aad7e52488b5c7a7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7S2429337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a61d60b3695d785904384214fa159569a0800b2947047de1ac27291a1810abc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:29Z), 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/QZZ7R2458104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c56216972ebcd5f89d41418a8d8517bab9d1e94a383ddd4fa4d8d7650ba7d61. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:50Z), 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/QZZ7R2458103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5337d7e3a5085c2fafcfa93113993c83cbe379c648bbd037311874f47925d1be. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:42Z), 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/QZZ7R2458096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe128cfea69e20fba5e3f25149247fbac3a26ac597b873782b011d81f660ac6f6. 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/QZNWT2543090.