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 0x7cfb40152037087478ec0ce066a17f0aeb8276f63a5d1f4e21334968c5a2c0a9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff9bdd00-38d0-48aa-a3fa-5494456a8b88.json and https://artists.proofprofile.net/proofs/artist/ff9bdd00-38d0-48aa-a3fa-5494456a8b88.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 0x2e2307aaeafce33e4b83e5ebe36d9be01b838537bd1953aeab2b81c76ab2d2c5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:16Z), 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/QZES52111101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7794998b61c9e67575cf226fceeb19c8529f1acd677690e38d8281c109dd3ff3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2189074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb5f8dda6420ca0b6e101727f041761505ae67ccaf87e50dbfe6bcabd19713f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2P2232723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e978225a6a63e8c1dd75f9de4aa8f39ffe0f6934580c82492707b3d86e2f3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:40:20Z), 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/FRX452321192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a64194b723850e5a259ab5625b6d34910482481b83341b0d1b650bdf51a102. 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/QMFME2303330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1227e0d4813dbc5528d93fd85f65dbe192046e29b6fcee164c1801af636fe3e9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QM6N22403208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d426defe7b5bdb01f78ab7d55988d36721acbaca9c656790ef1bb49467c103a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMDA62505126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753fa60723a81d0a644134dba27793a4602235c977d24656e38de813460235a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2330580.