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 0x76db92a59ba4251cf2ffca90e9c05d2e3ef9632591bd1d8e41fcc90a1cb9b681. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbee98a4-a10d-4051-8c50-f87af0aa2e36.json and https://artists.proofprofile.net/proofs/artist/dbee98a4-a10d-4051-8c50-f87af0aa2e36.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 0x4d293bfd1bab4c3965982c3b13fa622cdf335a511b04f11bb65fa6b5f1340378. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:03:53Z), 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/BGA471912080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871eab57916ecf04efa9251541543a09cd69ee506af8cc4701a037663a845a04. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BGA471912083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e98d8ba4893647e266e152c08f0f0a29481e4600c75b32607d6a09412032ec. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:37:34Z), 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/BGA471912084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebcb064ae50357709030cd4aac45bb2e7c9a4872ec959e7b5bbe880ab3a86a3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:18:56Z), 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/BGA471912085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7960b7cafcda483be0be5075a17c17fb053479456b62d9c2b328298ebb1c6f1d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:17:49Z), 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/BGA471912088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a0c020cee3237100bed48d639bee850ea19a6b477e4c6dde0a945e6cbcf1bd. 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/BGA471912091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdede8f2f2bc0c01bb0b54c06055f60b744bf9d7972343dc87f8ef86624d7b856. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:50Z), 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/BGA471912092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87633e87bcd99a60caf0d87554caa9e3d52c40fb7c4b6b45c19b45923103bc8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:33Z), 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/BGA471912095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd8b15b4a7ec205eb42c440fcb3884115a3bbdcbe80c1741c226b3f1281b7fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BGA471912097.