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 0x7a2979eebbaeb33509992563fc2cee96d29351e2c969a74212fdf330f99665b8. Chain 2 (Bitcoin): anchored in block 953852 (2026-06-15T23:13:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0188d4f7-f184-48dc-bd5c-968cc2bbce53.json and https://artists.proofprofile.net/proofs/artist/0188d4f7-f184-48dc-bd5c-968cc2bbce53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Robert Schumann: Dichterliebe - Myrtenlieder - Violin Concerto in D Minor, WoO 23 - Violin Sonata No. 1, Op. 105 - Three Romances, Op. 94
Bach: Goldberg Variations, BWV 988 (Arr. for Viola, Cello and Double Bass by Dmitry Sitkovetsky and Martin Stegner)
Bach: Suites for Violoncello Solo Nos. 1-6, BWV 1007-1012 (Arr. For Viola Solo by Martin Stegner)
Robert Schumann: Works For Viola And Piano
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 0x51b39280175e858fe9e71eab0000c0613889eac01d755a6bfdc924167e4b633a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DED991800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b70f3cb3d0e95aa8af02adf7027960f3a0a276d53f6d632e08d32b75b0527ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DED991900099.