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 0xb23a7bce1c4b422e63d1729a9dd48ab8b7c4b376a594431eb0cc227f97752418. 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/e3ec4301-c5ca-42b6-b808-07c4b7f08018.json and https://artists.proofprofile.net/proofs/artist/e3ec4301-c5ca-42b6-b808-07c4b7f08018.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 0x03392636f2e266c96bd39fda1bb14538127eb586bc2852f76701c3ecca435475. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:51Z), 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/DEE022001190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde6daea9875c3ef7e3c3c288c79294a72a4eb1149d8e54a328fe10f85f232f5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:05Z), 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/DEE022001270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf370c97e65f2e20cafe475cb2b1d2c9a5c5c34610f4f75894f922838cead82. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEE021601300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa57c291cc6554d06c72bfd6b293cf45b414b1f4881bc20228b761745b013f1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:01:18Z), 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/DEE021601310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250c04c06ddd63f0182ecba03a8a07ab7611e67c4f70e26e66ce4747ac7c8b94. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEE021601350.