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 0x7b561804e638f1a9a40ffbc31b20f591ff814a391631c1905e3d7b36c215d7c7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2b0d82d-7d0c-4ebb-a3b6-109233c97763.json and https://artists.proofprofile.net/proofs/artist/f2b0d82d-7d0c-4ebb-a3b6-109233c97763.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 0x96355503b2c6ffd55ac6d7de2b1ae6e83a4a4b938c62df87841114b0db84bfb1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZWFG2378757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961c2ce255517959831beac2edb8ba47bf51c586bc60a795e6deb480e4420916. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:51Z), 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/QZWFG2378759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e417c4319d50fe3132bc657e3d2ad1183d0a03ecc6bda2b3e3a26ec3764179e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFG2378760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281f99d3a7d87616e1c750975aa0a51b02206189197629d13d61cd9ef2b437f0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:29Z), 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/QZWFG2378763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa05fdfab6156858b39d8e0d674b89dbc17f8bc48d6dcec486ff7c22dc05e4fa. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHN92511274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5f64334aeae774eec02e1be2d9082b2d6ec1ed12d2e212982c9d0dc61ee732. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:03Z), 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/QZK6L2588114.