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 0x139d0a34a4423ff9fc2287653cb4330f031ad389921df704021be71d5625f1c7. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe170e5b-8e20-4595-a7eb-3d782c994210.json and https://artists.proofprofile.net/proofs/artist/fe170e5b-8e20-4595-a7eb-3d782c994210.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La traviata / Act 1: "Libiamo ne'lieti calici" (Brindisi)
Orchestra del Maggio Musicale Fiorentino
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 0x35d95be7f9344c778f2d9f5f80952b244ed45e4578e4f6dd0e9cd467ac526a1f. 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/NLA509104303.
Rigoletto / Act 1: Gran nuova! Gran nuova! - Tutto è gioia, tutto è festa (Scena e Coro)
Orchestra del Teatro Comunale di Bologna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3d536ffdee1768f23fab4287b22aa49bd3e50535f345edaa7bfba929a2125c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBF078940404.
Rigoletto / Act 1: Scena ed Aria. "Gualtier Maldè" - "Caro nome"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb437911c54ac9f29580999c4fe9a00109069b0599a93f4b12aa78261d35792fd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBF078940412.
Rigoletto / Act 2: Scena ed Aria. "Povero Rigoletto!" - "La rà, la rà"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae42643ce05831a9bf51d235535515fb530d643bf85679458ae554ec487298e2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBF078940418.
Puccini: Gianni Schicchi: "Povero, Buoso!" (Zita, Simone, Rinuccio, La Ciesca, Marco, Nella, Gherardo, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eff969d601808f159d2c4d47b8ac910d80325edcdf6b7bd64ffa392a769d23c. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/GBAYC9702817.
Puccini: Gianni Schicchi: "O Simone?" (Gherardo, La Ciesca, Zita, Marco, Simone, Nella, Rinuccio, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1fe5b07576d28a96b272ed675a9a91a4a5bc651c0073b9956579fbb4549723. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC9702818.
Puccini: Gianni Schicchi: "È aperto!" (Zita, Simone, La Ciesca, Marco, Simone, Nella, Rinuccio, Gherardo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef63cb2ce2e44ff8e18a96217f49338a493f22a08226d01c4cac5afb834a3e8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC9702819.
Puccini: Gianni Schicchi: "Dunque era vero!" (Simone, La Ciesca, Marco, Betto, Nella, Zita, Rinuccio, Gherardo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa728cffd81789eb7c3330ba26ac102016ff7bc7adb990fae0770bd978d1366a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBAYC9702820.
Puccini: Gianni Schicchi: "C'è una persona sola che ci può consigliare" (Rinuccio, Zita, Gherardino, La Ciesca, Nella, Gherardo, Marco, Simone, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fe975f0f33d2075c10a6dd41d8b8b7d20a6ca0d2abe0a4de833a78b1a86158. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBAYC9702821.
Puccini: Gianni Schicchi: "Quale aspetto sgomento e desolato!" (Schicchi, Rinuccio, Lauretta, Gherardo, Zita, La Ciesca, Nella, Simone, Marco, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd00758c31728accfb3bec029bc74a5ff5271c8983d4c25dedbd4940ab81a9e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBAYC9702824.
Puccini: Gianni Schicchi: "Brava la vecchia! Brava!" (Schicchi, Lauretta, Rinuccio, Zita, La Ciesca, Nella, Gherardo, Simone, Marco, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ed7fdc62b5dc256b90bf6c13bfbc8c8a8539aa3fd59a712940e27f5d778876. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAYC9702825.
Puccini: Gianni Schicchi: "Datemi il testamento!" (Schicchi, Lauretta, Rinuccio, Zita, La Ciesca, Nella, Gherardo, Marco, Simone, Betto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d68e58b1232095b8e6b2de51fecba7c94999f9b8958960a58f87b1be77fbcfb. 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/GBAYC9702827.