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 0xffecc01a4e26e8237833931e442f1ad5c3b31cc96c993550820ade1aabd63f6b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/096670de-933a-4962-a397-84dd0227c0cb.json and https://artists.proofprofile.net/proofs/artist/096670de-933a-4962-a397-84dd0227c0cb.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 0xdd75078e09f91f75e084313823c399850f30954eec8a4b601034111912eae5dd. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:30:26Z), 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/QZMEP2374524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba75b357e586997ec7c7e00fd4c914e1db69106aedf8bc6cdd3d241cbcbfc6fd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:22Z), 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/QZRP52373156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf510e738f1d4b8fbcaedf8119fb2065c2c3c210175a92ff7a9a63dd6766e91df. 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/QZWFQ2364592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d47037b36ecb77528add75cd567ac57c12be85ec6b8df78f7621cd210ca5433. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZWFJ2445265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493965fa3a1a37f3fca4643dbce71d1258b086cbee53d5cf922e2a2fb169e5f0. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:21Z), 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/QZTBF2471764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6127ea688a95102d096b5d3756397cde59d81ece2581f3687ebff38e9143db59. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZFZ22525573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d47037b36ecb77528add75cd567ac57c12be85ec6b8df78f7621cd210ca5433. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFJ2445265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493965fa3a1a37f3fca4643dbce71d1258b086cbee53d5cf922e2a2fb169e5f0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTBF2471764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3f448c3eb44db1b83229dd497ed4e83b74734cbe4d4ddf5a6475235fcc6d6c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:47:34Z), 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/QZK6J2548860.