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 0x57bf56c8683b6f6da5de80b98318dd32c3ff1c7dfd73e1b71920b21403ef32ba. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3212cca4-6929-4592-ac28-f484179bfbf7.json and https://artists.proofprofile.net/proofs/artist/3212cca4-6929-4592-ac28-f484179bfbf7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Puccini: Madama Butterfly, Act 2: "Che vuol da me?" (Butterfly, Suzuki, Sharpless, Kate)
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 0xba9698755fbeba0c4b60bfcc9a217f33a93d9a422e173655ea3b8878f093fce3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC1400696.
Verdi: Il trovatore, Act 1: "Che più t’arresti?" (Ines, Leonora)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4127256fe561ccca91e7cf34216b2d0286b29179b07c04e67a8fe8710d4e0a87. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBAYC1400740.
Verdi: Il trovatore, Act 1: "Quanto narrasti di turbamento m'ha piena I'alma!" (Ines, Leonora)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3808bcefba922fc7b10cb0b84191e791c3d8dba6b8d2d529ad7a0f35abd84ef4. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBAYC1400742.
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
Verdi: Il trovatore, Act 2: "Perché piangete?" - "O dolci amiche" (Leonora, Ines, Conte, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12ae89b29599b8965250a875927174d1363cb09d561f0c64322a1fc53f17244. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GBAYC1400762.
Verdi: Il trovatore, Act 2: "E deggio e posso crederlo?" (Leonora, Conte, Manrico, Ines, Coro, Ferrando, Ruiz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3eb6cbd923d9ffcbef5f00ece8ae91739387d12b20b0f5f0aa334ae316da7b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBAYC1400763.