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 0xd4152bb6f12fc5b2631b374c0273be2762259051b35c11361a7282e7aaca3de6. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31ea6637-ed09-421d-b8fe-b0f68623a0bc.json and https://artists.proofprofile.net/proofs/artist/31ea6637-ed09-421d-b8fe-b0f68623a0bc.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 0x85e628173c99bc52418b92c6149920f7a80229d14c30665e2dfaefc57605b138. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:22Z), 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/INV351500895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29602f3d461a0db2b520126631346a1f1cd7c519ab57f5ba9f2bd3271aa50f3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INV351500890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cffaf3c0d8d1ac3b9b0d2152f3d450437bd1424b3bdb9ab59085a861cfe65ef. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/INV351500891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a32ca06bd4d838ff6e2ecda2e2efa818f465caaeba2454894e824022d3dcba4. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:02Z), 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/INV351500894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faf062ff13f74723980f21b5b46bb4074d2335be010ceb8383d68be86261416. 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/INV351500892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a2ea7a122500c276d06376066ff3dbed1e415fdd93b61724f75f45a8a7fd39. 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/INV351500893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a168abe61999cd871e0addf44d6879bdbc44a9a34caeb03911000d285941c79. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/INV351500896.