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 0x2a9ef081ee0d49fe2dc7bd18447302b5ee3987c976371d64d51bfe2d295c6bef. 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/a4348cbe-2aa5-43b0-976e-a4fc412200d8.json and https://artists.proofprofile.net/proofs/artist/a4348cbe-2aa5-43b0-976e-a4fc412200d8.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 0x4af35f0f6e05a53c0380050d3f81b2d51e44b55a6b900d0be8e4f792d9ad7ae7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:25Z), 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/ITZN62500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22a35791deaee23c737065f15cc5b2f3d3422a2c2566caa015eb54749c07041. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DEH742518489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6f8b15db0e629a42b9086f6770f14d25fb291da88672f402561d7b7fbe0bb6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEH742522623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5f28ed597e6f8a14a9da3d8d9f025eca798e89f344d11f4ccdc2e2780ebb24. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITZN62500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa285d798746dac2780dd6772af614596a850ade6f7936290cb04618624950c21. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:05Z), 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/DEH742525967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38c24112f474de54095a847f9d13e3942fc7cc78b5cd99658e8ae96098d6b1a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:13Z), 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/CBEYJ2450403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745fb47ddebf4c350f212001c565360e243b37849144071d775a7458e25ac1b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLHR22400978.