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 0x8e918b8cf75cfb18a44bf9485e8575a24838c7ad249ab8df4749ab646c5d0078. 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/daa9e974-cb34-4756-96fd-aa6b558a6478.json and https://artists.proofprofile.net/proofs/artist/daa9e974-cb34-4756-96fd-aa6b558a6478.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 0x78865c84ca7a85cf82a1ccaeff8d93724955e3fc1b911db44c713189156057f4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:50:21Z), 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/QZW9L2291785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8309311b5caf871fa16c3d2db776c84638812f98af73c97c92049e2ecbea5eb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:45:59Z), 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/BX90M2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a15799b583a2600f43283a6c183ca531a914fe825961fe7ed90f2cbaeae4aef. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:22Z), 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/BX90M2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291117cb7f56809b6d6ff335705290b1168778597761551310e9ebd66a93fe6b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:56:20Z), 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/BX90M2400009.