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 0xc2b635d14970dc0ffcb96883420fd60fcbca7d1783553439248cdc4eaf52110c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9da80528-6399-4485-bf36-ec727f987a05.json and https://artists.proofprofile.net/proofs/artist/9da80528-6399-4485-bf36-ec727f987a05.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 0x326aa601a8d23748bc7f0aed0ac2ed8dfa34084b74c603d5d49c7eca4c0a518a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA72321040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f217a26633056899f8adce9d5ed8dc158c868dba0fd8ecafa2b06c5425e561d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFH2377807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3d041d5a039dcff48e7b5f300a4891e804825a0a1a04a9a02a9fde79a0c996. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62410067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88463ff78a0979bc1d3dab1e0ee6f2d6eb0f96421b920833002b43e231548e37. 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/QZES82456587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b9ffa361ddd6d74b2f76f724619204c3f5e6c2a1b53868aad144ae06220332. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:48Z), 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/QZWFX2403626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f0b7ba64cd818bdf1704901e0301b5cc281298dd6ef2288c0362798cdb1abf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ22579968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72223ad5cb742820253959a24b118d5bd017389c03abd7995acdc7e8db644616. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:31Z), 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/QZES62537886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d569679663ae61a3af23261efe12ccc790247fc8c7c6d188c649ed43ee1389. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZRP52535236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b99791b02a0e1f6fd6e5c32f82a421fd1760e644e653a49801f8cd75ce8dae. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZWFH2528228.