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 0x6388c3c685ffbbd753fb8724f0f7c769d9f294f00ecb4f400815dffb72685f24. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/451226c3-4846-4b4c-9b3c-a3e26e00b552.json and https://artists.proofprofile.net/proofs/artist/451226c3-4846-4b4c-9b3c-a3e26e00b552.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 0xd82e33ff4a2c397295717d401aeb90b3df5ecf181b2afc02499420a8759fb5b6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX8LE2507090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39f3f7fcd63aef1eb60d252a9fe7b13a5d0d56a5c791aa582b1283ec23787b1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GX8LE2503263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1693a74769ff228df1605864644abb06ff6d7d126dc9edf44703cfaa312809b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:08Z), 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/GX8LE2544634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c22ea8cceea1ecdeacf00090848efeb406d329649b6726e919a6b04085e01. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX4R52548203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddab62694318d529c68cd48181cf17e5b30fdeb9ce5d9fcfdc2ee265e5d8cce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX4R52563453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd5baf15443e77a6e38d8561e9d706cd9e2c56a709b2631866cfc9c60b9c613. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:54Z), 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/GX4R52597882.