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 0xd46c8f2f26324f1d9319bf9cbd5689cedd942aa1d2eae5470865a052a0e5d74d. 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/b153fee9-aba0-4f88-b3f9-d4d08ba6075e.json and https://artists.proofprofile.net/proofs/artist/b153fee9-aba0-4f88-b3f9-d4d08ba6075e.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 0xb9efc27defa835ead8156529ff1eaa9e5b1b9561c83b04b8c00e592067e4b892. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZES82317002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdca3c56dcb8f1ea4ffcc97a5371d87d7851a5d18eb919680f00ffc1bfa5d495. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN82300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf93306d93f40dad01b56120e347924a52c5ed4ecb6b899fd118ae3cc3f0aae. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:54Z), 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/QZHNA2371099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22b6bb7d48a398a41340133b76ccca68ed3108ba27f0a4115ab7df95a86f102. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:18Z), 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/QZDA52424955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42971a4bb4a82ea2e369646acb798e6642e44fb8ec92211223e6abcf811401fa. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:01Z), 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/QZZ7T2549920.