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 0x2722db7f8846ea861129ec4d9ad101e4c2daf140df0941f8690db814914120eb. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12805ddd-8edc-44ce-8a03-967dec5bb5f6.json and https://artists.proofprofile.net/proofs/artist/12805ddd-8edc-44ce-8a03-967dec5bb5f6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
G. Charpentier: Louise / Act III: Depuis le jour (Live)
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 0x5cfdd58977c3459dcf2cf86c7508e49f874026f137ace0229be7264501d1e363. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206378 — a six-check JSON result.
Le nozze di Figaro, K. 492 / Act III: E Susanna non vien! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216804c03b10d63190a6fc99402bf708dd4ef0967d2b58278566a3071d58c2f8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USY3P2206369 — a six-check JSON result.
Le nozze di Figaro, K. 492 / Act III: Dove sono - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c4880e265c897870e74f5609cbeeeafcbbdf33923b6ed7864e5299882441e4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USY3P2206370 — a six-check JSON result.
Le nozze di Figaro, K. 492 / Act III: Cosa mi narri! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3de29bd2c21d3427b3d82997be071c67b0583d03a71c205274a3d8575508ed2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206371 — a six-check JSON result.
Le nozze di Figaro, K. 492 / Act III: Sull'aria - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe466a1491419054d80a39f74578a373d565a7d0b0b7fcad91a1252e21743b5e4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USY3P2206372 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf783500f8c396220c5058992c881f82f0a51ff4e85b4df3d12f586c9ed9f1899. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206373 — a six-check JSON result.
Otello / Act IV: Piangea cantando - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5f56697f14206a4854414c01b1cbe647883530eadba49c0eb8c35f611ff1bc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206374 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930f2982c77851051bb56de8958c30166a8c5fc4de69f424a5ef55849f721664. 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/USY3P2206375 — a six-check JSON result.
Arabella, Op. 79, TrV 263 / Act III: Das war sehr gut, Mandryka - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef225ebce279fa60d4aab936cb987746555ee7929eb356416be50c05eca632b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206376 — a six-check JSON result.
Faust, CG 4 / Act IV: Alerte, alerte! (Rev. 1869) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84a9a1bfb5a3082b8d8f347e48430d69d8118251be58b5ba87bc51ef6720d1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USY3P2206379 — a six-check JSON result.
Rusalka, Op. 114, B. 203 / Act I: Mesicku na nebi hlubokém - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52addebb0780859d81dd6635d634463377b76614716fd52bddd8bda33ffe454. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206380 — a six-check JSON result.
Manon / Act III: Obéissons quand leur voix appelle - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2f821c96e655cb8532ee690a0ae30daadd15fb0be664927e3d61e0f58b25cb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USY3P2206381 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ab04341437192fa9e9268349996b1c648a2d42f3ecad9e50fc4cc6167e3d5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206382 — a six-check JSON result.
Manon / Act III: N'est-ce plus ma main? - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fd2edf663efac070c81e03a6c1dbae3fe639adfd63f51c4699bfa85c28c892. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206383 — a six-check JSON result.
Susannah / Act I: Ain't it a pretty night? - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe351ba2be6386aeb5f305be01cd990e33b5f8a50e3f6b52f29bee491d113d9a9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P2206384 — a six-check JSON result.
Der Rosenkavalier, Op. 59, TrV 227 / Act III: Marie Theres'! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7468414c4b40b7076c4212f2f4fec8866d3b6bfbc9c1efef2a26cdf2daafc88. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USY3P2206386 — a six-check JSON result.
Don Giovanni, K. 527 / Act II: Crudele? Ah no, mio bene! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383a01a95fa04eb678433413e3ce0f966edd56a3528fa1501284e0ab419ced2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USY3P2206387 — a six-check JSON result.