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 0x449d0a9b79e88a0e79fe6d7228b523cf81aaa5edbdb2e62f575d38991b6e7177. 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/e88f7181-1819-4f7c-9f06-1416a47d8588.json and https://artists.proofprofile.net/proofs/artist/e88f7181-1819-4f7c-9f06-1416a47d8588.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 0x9c4f2e699a09097964b48e5c0f4b68239744f677cba7a21633f634e38143a7de. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMEZE2122156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d17503e3995e6fda9c33d44217ff6d0e47bcc246e41c96171621ad580f8f637. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:05Z), 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/QMEZE2141805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3c8280307a809eecd1806fcd03e37f8ef574ebd75267890513471bad03e087. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX5MX2292828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf592ad495898c52b4c723c79dab7cbd25aa65a41ac521d789e3fff5d49d86cff. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GX5MY2274004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031d204b75f38d1178b72877d29fcfbe40c5b26105934df2d44415557eb7d37d. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:26Z), 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/GBSMU0113162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c094c04e9760845b932c0d5d335159fc46cc4c8e63ac6ca640be1ca2ccd76fa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBMA22137133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f15fec5a845dfa9120d77e32686eba30d730b93556b53a466be8ef84eeda28. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0M2463486.