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 0xf306c47ee60320f84b33025dfc936af383e69bfb056dcefa7573d3d190514997. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d642784-f11b-45f9-ae03-079f05861e8e.json and https://artists.proofprofile.net/proofs/artist/8d642784-f11b-45f9-ae03-079f05861e8e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Puccini: Turandot, Act 1: "Fermo! che fai?" (Coro, Calaf, Pong, Pang, Ping)
Coro dell'Accademia Nazionale Di Santa Cecilia
Orchestra dell'Accademia Nazionale di Santa Cecilia
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 0x28b3146bf8129db367dcddab0c600d325be0a4d1cb2d3b420e6115c960fe3ae5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202624 — a six-check JSON result.
Puccini: Turandot, Act 1: "Notte senza lumicino" (Coro, Calaf, Pong, Pang, Ping, Timur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26fc765a8ce9414bec6eb879b9c1b25003ff1b2cc2ef5760fd9bc5effc99e44. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202626 — a six-check JSON result.
Puccini: Turandot, Act 2: "Olà, Pang! Olà, Pong!" (Ping, Pong, Pang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90fa6cd660c9a8d1ff127373cc331cc037ccf277597a8a1c8816301436ac219. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202630 — a six-check JSON result.
Puccini: Turandot, Act 2: "O Cina, che or sussulti" (Ping, Coro, Pong, Pang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7aab6adce398cfdd7b2cc621db36b90daebc7bea89e1dbf9c9b4ac3ea756ff. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202631 — a six-check JSON result.
Puccini: Turandot, Act 2: "Ho una casa nell’Honan" (Ping, Pong, Pang, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b549d59ae1f76bfe2508d21c2a645dc3649217a288b8026823e4cc2ca7ec14. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202632 — a six-check JSON result.
Puccini: Turandot, Act 2: "O mondo, pieno di pazzi innamorati!" (Coro, Ping, Pong, Pang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e17a2098f123261ad6c3847ac955ad854eab575b138106c249d2edbce527df5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202633 — a six-check JSON result.
Puccini: Turandot, Act 2: "Addio, amore! Addio, razza!" (Coro, Pong, Pang, Ping)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2942bad42b367c2fc8ec18cdc8535711def239e6053d2d4d4628c40fa113506. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202634 — a six-check JSON result.
Puccini: Turandot, Act 2: "Udite trombe! Altro che pace!" (Pong, Pang, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355534c384ed6a9e2b50d89cd32451b7d0f7bab03a48b6066188e79e595c694d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202636 — a six-check JSON result.
Puccini: Turandot, Act 3: "Tu che guardi le stelle" (Ping, Pong, Pang, Coro, Calaf)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025346dd0b5bf4393262d9459ef1a115d4f287d414bd855603e05041dd27b278. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202654 — a six-check JSON result.
Puccini: Turandot, Act 3: "Liù...bontà! Liù...dolcezza!" (Timur, Ping, Pong, Pang, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091029fd16db71cd271bc2ed31d65a76b940f25ae392839ce4151402d4f59a71. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2202662 — a six-check JSON result.
Parsifal, Act I: He! Ho! Waldhüter ihr! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaace45cd016c46445eabd2cf066e2689226f94f895e7b62efcecdf8b118fccdd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962433302 — a six-check JSON result.
Parsifal, Act I: Seht dort die wilde Reiterin! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb56f414b10190c6c704a5307a1cc9e2d5ef1f97f8672453d60297634fe27f8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962433303 — a six-check JSON result.
Parsifal, Act I: Weh! Weh! – Hoho! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ffedbd6cf6f732781a01129257d47520baa2f07485dc6935118b7ba1b59d59. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962433308 — a six-check JSON result.