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 0x273e9161c5949b6854d96f91ae3160e95d015305c2282ec5cf32fee382c6914f. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bccc404-b89f-4624-812f-6192bee4ee92.json and https://artists.proofprofile.net/proofs/artist/1bccc404-b89f-4624-812f-6192bee4ee92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mussorgsky: Boris Godunov, Prologue, Coronation Scene: "Da zdrastvuet tsar' Boris Fedorovich!" (Shuysky, Chorus)
Orchestre National Radiodiffusion Française
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 0xddab92317cd7432f691362f17e332de866c2eb16c3d379c10a199bb301b715f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ115206632.
Mussorgsky: Boris Godunov, Act 1: Song of the Hostess. "Poymala ya siza seleznya" (The Hostess, Varlaam, Misail)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da36e44ccc88221ea8aac284971d1634a708d82f0bb7668f5ceb6309ee91c30. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZ115206640.
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
Mussorgsky: Boris Godunov, Act 1: "Zheno, mir domu tvoemu!" (Varlaam, Misail, The Hostess, Grigoriy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d83e2366e2d290a3f12640799fc281c1d1e105038d17f08072340e4a198e60. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ115206641.
Mussorgsky: Boris Godunov, Act 1: Drinking Song. "Kak vo gorode bylo vo Kazani" (Varlaam, Grigoriy, Misail)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528c65ca794db3b7e1ffaea197f6b4ab806a7d33adc6010eedec9e96abfffd9a. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/FRZ115206642.