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 0xc055a7f52b1c25b8b995b119b36e7746f30e01e23599b9a81e675adfdaa684ef. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/403ad791-ab96-4469-96de-f717fb686763.json and https://artists.proofprofile.net/proofs/artist/403ad791-ab96-4469-96de-f717fb686763.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mussorgsky: Boris Godunov, Prologue: "Nu, chtozh vy?" (Officier, 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 0xa9f3a78576fe843ccde40f63fa5197227578d92610c8f6cff5cf38afae7fbce0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ115206628.
Mussorgsky: Boris Godunov, Prologue, Coronation Scene: "Da zdrastvuet tsar' Boris Fedorovich!" (Shuysky, Chorus)
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: Grigoriy's Dream. "Bozhe krepkiy pravyi" (Chorus, Grigoriy, Pimen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea2a37e9999b8089dbb7f5efe440b8f0f4edfc68f0dcb102f01067c7eea23b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ115206636.
Mussorgsky: Boris Godunov, Act 1: "Zvonyat k zautreni" (Chorus, Grigoriy, Pimen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77bf5fd13aec58fcdc02ee99c1d79898bff49f2b0ee3f3c96fa050369339d32. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ115206639.
Mussorgsky: Boris Godunov, Act 4: Council of Boyars. "Chto zh, poydem na golosa, boyare" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6926e0018cbf0651ab9a0315f5f7f3d3af4b0aaba7aa48e92fd424c261ebe8f. 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/FRZ115206675.
Mussorgsky: Boris Godunov, Prologue: Pilgrim's Chorus. "Slava tebe, tvortsu vsevyshnemu" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf549d01216327da0a2fb7d4c8c37581c66ea5a2750060a5c468a3f99c6bff397. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRZ115206630.
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, Prologue, Coronation Scene: "Slava! Slava! Slava!" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8125a8ce87251eb834d4883e09c2bd487771ff16f0c70e6eef37e9f3e3485baf. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRZ115206634.