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 0x2e0a5284b65d1d216f15996d8c478e9b2f02096d35cc83a1811985b345420bc4. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6fba570-0d3c-43c0-b119-325899495d51.json and https://artists.proofprofile.net/proofs/artist/c6fba570-0d3c-43c0-b119-325899495d51.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 0xfee920117c712b858e1a5b19a2da73214f9d40f2dff4eea287849c8e6abc28b2. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZES72550819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4f917482ef4e611d73e0de10854c25709af4d1746b3d0cae8e72a107b08d7a. 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/QZES72550821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfdf23592ff17e9e4b1032dfecd986b414f6eaf60cb97eace61ca76226e3e6c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:59:03Z), 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/QZES72550827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6fb18eca812a88b17a14eb228505656a7ec36463bb79b948c879ba60c9bbb0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:39:40Z), 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/QZHNB2536888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5fb59a50a8c97ba5feaf413c783f959add20ad1f9e30d79124d9bb20dd136f. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTB72541174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b8f604da37882b7e8d7369dfb2a13fcb90d8507823b5190f202fe56742f9d4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB42533856.