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 0x100506356445c0f2ffac9964e1e341fd718fff0044223177127b1802ed65f328. 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/856def90-eea3-4a78-86a5-a3c8f94d57f8.json and https://artists.proofprofile.net/proofs/artist/856def90-eea3-4a78-86a5-a3c8f94d57f8.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 0xbe8e35308399c1a8c945146f8da1b538e352290d95c98178a37e7e907f12f93f. 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/QZEQU2144956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f066e1cb21b54cc97e78ff6dd7de983013645bd95534583710c8f4bebc11631. 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/QZMZ92205395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94d63cbd56c4a7dd9fa8c3b9a290cbbfc196f14cba649c85363d495185069e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/US7VG2361774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8e35308399c1a8c945146f8da1b538e352290d95c98178a37e7e907f12f93f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZEQU2144956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13370f9411ea53c88e5fe117ac40a57e25166b1aabfa648caf5dd4d46b9f3d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:32Z), 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/QMCHU2401019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b56364190bd0debb869da31de8f65ce3453cfce4a697aac128dd1ff8595e6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:05:23Z), 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/QMCHU2401033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dec34332ab8b651fd3347a519799cc299a9abe989c763d115cff1b4fa7c205e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QMCHU2401038.