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 0x1f0b9718605d33f7978ee556ee0facc186eebd3253b6b6e0e37b7fcbbd90eb81. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a403ea6-7dcd-488c-b6ec-cc581035db63.json and https://artists.proofprofile.net/proofs/artist/6a403ea6-7dcd-488c-b6ec-cc581035db63.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 0x609bd0d98b7037683ebddca55eccf1bf0c373dc8476f20d1bf3f693684647b40. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:22:09Z), 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/QZES62310085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cb9ae3d3c03aa5d01d81c18c8f452c4e9187ecf8a95c359e09bdc64b086f4a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:30:54Z), 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/QZES62310089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc1dc61f9dc87dfefe2cf239eb49f764163a849577b83892031049ccf176e0f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES62310087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f0cde7170df1b89b1675db19dfe47465ad8b4b821463cb1ca87cb18e4a4b3f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:36:46Z), 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/QZHN52568388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1797a75f5a384a505017ec42f25be047395380c23c0c7d160cfb59992e5fd8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN52568389.