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 0x9bb5bf3240c67dec149da7163878c3265f667e4566b20fc03cc2986f05eafe6f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7f0fef9-bdd2-49a8-8ea4-2b8961a10cf9.json and https://artists.proofprofile.net/proofs/artist/e7f0fef9-bdd2-49a8-8ea4-2b8961a10cf9.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 0x0af67a6734f3eef359afe4d8dd79d4295a9320a620a8f189854b18806d281de2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:25:34Z), 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/USHM22039889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8748b704460131f74e658d232899337202d1ec261c3aa908e73fe9380719a3f3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM22039890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5cb5b4c51a26c9d29005bab4cefcd1fe8dbff64f9235ea104d3b267db0960c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:28:40Z), 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/USHM22039891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb008afe978ac5c67a27fef4893e321b350409c67fd0008bfada2dfb380442cb. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:23:07Z), 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/USHM22039894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09e879bf1011b8e6641bcd3830bb249e974ca111ab2a8f1a3304ed31637723d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:37:16Z), 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/USHM22039905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846693586d0d32833f83f5997cd221df36bf466a202ae2ff09974b838bcd4ffd. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USHM22039909.