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 0x7c26f1aa90420ea23e77788eb1c30e3f7a61f95246f03019bfcebbd0a5cb48c4. 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/e2d17811-1d8a-48e8-aa23-1acf962c1ab1.json and https://artists.proofprofile.net/proofs/artist/e2d17811-1d8a-48e8-aa23-1acf962c1ab1.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 0x87c188a6ec2aeef58303e1c5bf75017f42ce1a7bf42986469a8dfedbd423a5bd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ7P2467801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a7991bfeadd17fe51cf5b26ad49737bec10ffa86acb95b59f4e6536ed610d3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:37:00Z), 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/QZZ7P2467802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f767de06bdb6aa76d8051da2d97fac18aca8fe0f6e423605832c5acab7666c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7P2467803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8b30d41c7914d251888367e22381c0933cd6b716a83bfaaa5393683b5a0fb8. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:38:50Z), 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/QZZ7P2467804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb2b2a1741446c0beed23ecd6d45550bbf8783165d36b87c2401971a0e01049. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZZ7P2467805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e6bb871ba1e240ad43b5d279fb7406fe1ff9d839c0cdfe7a1ec5aa134c1959. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ7P2467806.