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 0x46603c3e790b68d49f60fbf6fdc449ea8e9343351bf7469f062cee264b1b03ba. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aacc038d-dc4a-47be-93b2-165041e0d0f5.json and https://artists.proofprofile.net/proofs/artist/aacc038d-dc4a-47be-93b2-165041e0d0f5.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 0x57b852df268d315e96c28dd2c7e50f12107c99b3464030d7de503d5bda99029c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZES62115375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca0ab6747db0e7454345023a6dc9bcc020daac95ee574237a245a55b9db1ebc. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:50Z), 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/QZHN42281507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfa69ce89c167b0b33126d2d20fe2a1014e2fcce5b04213becf5376edd7c25. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEZC62288301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba055f21629bbefe1305a2de99c61227b7ac8e81e8911331c0dd00e6b2f3d09. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:25:05Z), 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/QZNWY2220339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1741ba60bc4f3da05f6e3e1e743dd687bed6dcb91996c086925d3e1e89eec. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DEZC62344904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1eee6f99230f23a00d77241ea3dd6622940d4edbc8dd9839f6f531b8aa5753. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62431495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb1fe4b9d3b40d03b381f6ae8ee8cd65fa7b5d33d315dea4c8303f02331127e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFP2499413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06f4b15c2247ac74bb7623c5a9803dfaae72d3e2c40df4b15b27b71ab40c7fc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:09:20Z), 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/DEZC62468974.