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 0x4d0863a602515db0428b237da926f75b47829b1dd993b4f4c3dc693f59d1a10f. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93aef24a-629a-4c98-8bd5-ac76d3239a74.json and https://artists.proofprofile.net/proofs/artist/93aef24a-629a-4c98-8bd5-ac76d3239a74.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 0xfb13199702cd25c0311b85be03e6432bfbfe47cc1af85828bb920391f0c8bec4. 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/QZ5FN1936473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49b7ff2cae5e1a4c0c5ae8f66e1bb25b1104745d2136bf255cdbefa28c4e453. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/GBRKQ2007998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caea41fea7fd8d2f49a8edcd8b0ae3b2eed564207d157a28193287afc9d5577. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:33Z), 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/GBRKQ2008000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbbb10b2e232891979078bcaf876b0d5e822f24c5f7fe0772d54f3a2109d3be. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:18Z), 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/GBRKQ2008002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489cc530f68d3dddaf160708c9de8ed5a2f701d62274dc8ed3f8d55a79708a0f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:22:23Z), 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/GBRKQ2008006.