thumb|upright=1.35|14th-century miniature of the Battle of Dorylaeum (1147), a Second Crusade battle, from the Estoire d'Eracles|alt=Medieval illustration of a battle during the Second Crusade The Cr
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bb0e548e8a04f707c7b46f8b9b414b3e9cdcc71b295c362738955e50485873. 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/42539e30-eeb7-4dd9-ac50-b8909b2ce940.json and https://artists.proofprofile.net/proofs/artist/42539e30-eeb7-4dd9-ac50-b8909b2ce940.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Sun Is Down and the Night Is Riding In
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2ee021807fed8be5ba86ca8b70c2cb1bd6b3192057fbfe3eb8027c5736aa62. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USHM81684381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42424b52a46ce904054222add09f9cfa22c8ed049b7a4295ac03cc57963273b6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USHM81684383.
Perhaps You Deliver This Judgment With Greater Fear Than I Receive It
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72485d2f840f5101fcf7cceb29bbfae7a43cc4acee4b58ab005ff89c4585d213. 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/US4KC1333302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cabcba0080cf4dca0a81ea2ea91646e796d0a807d537ecb4c80cc4f5309710. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/US4KC1333303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec78c6ce5a32fe1dce176e12fc89d1b21a2750bcaea68ac78a1b83f3aa10b18. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/US4KC1333306.
This Is a Sickness and Sickness Will End