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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe499c810d82a0c74899b9a0d50afec7df2ffb88ca22eda7cfe6972cad85b82ad. Chain 2 (Bitcoin): anchored in block 953869 (2026-06-16T01:20:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0636621d-e8ba-4366-b149-94a25dd0395f.json and https://artists.proofprofile.net/proofs/artist/0636621d-e8ba-4366-b149-94a25dd0395f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Elijah, Op. 70, MWV A 25, Part 1: No. 7, Double Quartet. For He shall give His angels to watch over thee
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e93530c884bc34cad049e39ae7e037f2e542937cfeed7005cbde4d7f7a2335. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBDGQ2439810.
Elijah, Op. 70, MWV A 25, Part 1: No. 15, Quartet. Cast thy burden upon the Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb51866f38b3905bb77a388a6f2b0cf3f3f36d0674535f51fc8f3747daa8f38. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBDGQ2439818.
Elijah, Op. 70, MWV A 25, Part 2: No. 28, Trio. Lift thine eyes, O lift thine eyes to the mountains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bfa0e7e6d91244b0d930bc6853ff1f990e5263980d09fdbbbacfc2c2980da2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBDGQ2439831.
Elijah, Op. 70, MWV A 25, Part 2: No. 35, Recitative and Quartet with Chorus. Above Him stood the Seraphim - Holy, holy, holy is God the Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9403539b49aa10fe61bd68f4153715996c4c8baf6d97a66de2f11265502bf0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBDGQ2439838.