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 0x8eb9e4eecf081137cf9bd2032b6b77260d5b468ff2a6973bf2756b1b2ec7cc8a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a10d756a-eef7-4b27-aee7-e3fb27aa2748.json and https://artists.proofprofile.net/proofs/artist/a10d756a-eef7-4b27-aee7-e3fb27aa2748.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 0x7536dffb539bfee3cc3f5cbea81651e5d2c1f49cb0f951048447db41b9c911e7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USETB0610427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94a4a4de0f8cb6c89fcdd398fdb17e331d5caf44148ebf5a6a76d6ad3398714. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:40Z), 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/USETB0810641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2755992e29ef9363cef6e430704bea03f97fe030c913c11525953199f0726e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USETB0611885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd49395998aa5806feee9fae2c41e3df455a06c0d314905706ac4317cc0b5ec3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USETB0611887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2717ae8469bfd4a6a73ced4eb8a3f763fc7762286cf135806d8322bdf159e5. 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/USETB1000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb955b4135e45313d038325a9c9e5f927c2ce844f88429e08d4b36b5519ab80c. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/USETB1000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a26dd6d450f702f99a0bab1fc0ad6a355fd4a5ac32b7389f45f90c08ef198f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USETB1300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93faaae487653032b622f4bd4ecb4ef13ee025aa25243fd219b860c26854a85c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USETB1300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d125f8d15943e60dcc4b9df1af2e846440df9210b5131a93dc055ec4f6bb77. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USETB1300504.