Nicole Cabell (born October 17, 1977) is an American opera singer. She is best known as the 2005 winner of the BBC Cardiff Singer of the World Competition. Cabell was born in Panorama City, Californi
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 0x6f92461db10563b786af032204f79394d43bb45192ef57beed19cfd34ba18d1e. 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/31fa53f8-3357-45ea-83f5-bbfb801ccce1.json and https://artists.proofprofile.net/proofs/artist/31fa53f8-3357-45ea-83f5-bbfb801ccce1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Walker & Dawson: Orchestral Works (Live)
La Rondine / Act 1: "Chi il bel sogno di Doretta"
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 0x0c61d3d6f81e4737b4931b030eaac3896a4f51eb5df94fcd6cae476944feb970. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBBBA0542420 — a six-check JSON result.
La Bohème / Act 2: La commedia è stupenda! ... Quando m'en vo - Fuori il danaro!
Kinderchor des Stadttheaters am Gärtnerplatz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb567bc294ac5e926d3456c79e8430f7fca8d4ddc6d40755def8460afdd80539b. 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/DEN960730337 — a six-check JSON result.
La Bohème / Act 3: "Dunque è propio finita!" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10889074cfd1e3ecffc5da93d44577f62cb23b76b76cea0cae46770260215086. 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/DEN960730325 — a six-check JSON result.
La Bohème / Act 4: Oh Dio! Mimi! ...Che ha detto il medico?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7387d9029fc5b96bce4a8720557bd97cc6d13dbec8c9e7bf7d9d07ed36a4ec7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEN960730340 — a six-check JSON result.
La Bohème / Act 2: Ch'io beva del tossico! - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1137a4dac5f088cbafaf0c85b5af9a68be4ff63adc481b1b1d5585854429df1f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEN960730315 — a six-check JSON result.
La Bohème / Act 2: "Quando m'en vo" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf927db26e9cc47248b1c090a6b28a04ec8f8a32a56cd6a7b593857aadf184d2e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960730316 — a six-check JSON result.
La Bohème / Act 2: "Chi l'ha richiesto?...Caro! - Fuori il danaro!" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86e04372e9b49c4fa1d0aa48532c38166011ecb56ed50f601aca40f64fa1eca. 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/DEN960730317 — a six-check JSON result.
La Bohème / Act 3: "Ohè, là, le guardie!" - "Aprite!" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8767045cafe223b69c841bd82fbc73112a465dccf2630b78af68e2c122286425. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEN960730318 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628facc6bb9983ddd4dee790b80593b3c4af2cefeb91cf8c86c23d1d89e2431. 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/DEN960730330 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996fe728131d5c508d09128d459cf14d58ee46ba15d6cad8444a5c9115b92161. 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/DEN960730333 — a six-check JSON result.
La Bohème / Act 4: "Che ha detto il medico?" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066e42110089966dfde9a7035240e5228aaef0837e883bcf1c671379f9f08a0. 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/DEN960730334 — a six-check JSON result.