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 0x34059d24102242332068cd3121aaed8988945f2ef426c436e4e1ac15bed28e2e. 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/86b778f5-bfdd-4c79-ac36-dcd93d8ee20d.json and https://artists.proofprofile.net/proofs/artist/86b778f5-bfdd-4c79-ac36-dcd93d8ee20d.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 0x83c31408b1f69a5b2067124c3016188eabf5a9f385c6abc0ad5ac4f2bab69505. 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/GTA112100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eee4b7d2a623fa8088f4aec87e43167a14dcabe0c7eb6d39503b7c0439aecc. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:57:15Z), 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/GTA112100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7353cdf9ddedc35819ce63d572c1049e7ca13df4e088284254a60946af450. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:08:59Z), 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/GTA112100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b8665efb65186c7839ac23dd4b2efbfeaee636a2ae1c955e6dc9f57f307c40. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:56Z), 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/GTA112100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b52a5434d073dbebec2c765376448eba430abc7962a4b5bcd8c7747bad48cc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:59:52Z), 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/GTA112500047.