thumb|Fired clay brick. The cuneiform inscription mentions the name of the Elamite king Shilhak-Inshushinak I. Middle Elamite Period, 1150-1120 BCE. From Liyan, Iran. British Museum Liyan is an Elamit
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 0x80077df59d01039e3c8246eb8abde5bde248bb7b34c94e4440f41868aa4d1fd1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7a0a6bb-a4d7-4265-ae51-1114a3709810.json and https://artists.proofprofile.net/proofs/artist/a7a0a6bb-a4d7-4265-ae51-1114a3709810.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 0x531fd2dbd7c7f0acf3dbff6ce268205d3463b35162bab02258340fb40154cceb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZQAY2175649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84417eeb21116d5c634c295c78e6023aa9f707d56e51e279ca8c3782da2b1c7d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZSYP2322330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8bcd21f30e85d0bb88f042fb563b9998f1856aead6629ff08157bd30d1947a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:48Z), 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/TCAIU2467502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef75762c552c46fa23ddea81d56348da9d33b9bea64415509d3818457d33613. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIT2467529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a23c3fe1f6f1bc6dd24ccf58e94aab729444031d36e57ffbf43a2c7dfb6d66. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIU2467545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265e3c989a63e8bad386a444c5ee772bd701f392f7151dea77e5d943f5efb95. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIT2467561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a8e00a470f11755cb4c69faecbc4f8e9b6ae557f2696d968479b6cd51382bc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAIT2467598.