John Chest (born July 6, 1985) is an American baritone opera singer performing with leading opera companies around the world. Career John Chest was born in Greenville, South Carolina, to parents Sand
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 0x0734a5873e3ded112e71a4f47bbe3986b17d14764a4db132e11153eec2ef5aa8. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7d71dca-aeac-4117-8308-7bd34b996d83.json and https://artists.proofprofile.net/proofs/artist/d7d71dca-aeac-4117-8308-7bd34b996d83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Handel: Theodora, HWV 68, Pt. 1 Scene 1: Air. "Go, My Faithful Soldier, Go" (Valens)
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 0x2556677c2765c149f928b2182f24bd17bbdf1794132a5d714d1ede4b7c77d6b9. 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/GBAYC2200948.
Handel: Theodora, HWV 68, Pt. 1 Scene 1: Air. "Racks, Gibbets, Sword and Fire" (Valens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66515f5f907d1fb571c8fa211c1c1813f45c655d14b7b51884b3243975bf44. 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/GBAYC2200951.
Handel: Theodora, HWV 68, Pt. 1 Scene 1: Recitative. "Tis Diocletian’s Natal Day" (Valens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064d7d560c68b2265b6ea496bcd8b75793d3cc7c20f97b82ea329105b9e373bb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2200947.
Handel: Theodora, HWV 68, Pt. 1 Scene 1: Recitative. "Vouchsafe, Dread Sir" (Didymus, Valens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5473fa0775c644ddef5bab4cc4b6be91b6f7719b9beac0f9711a4befb36a7689. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBAYC2200950.
Handel: Theodora, HWV 68, Pt. 2 Scene 1: Recitative. "Ye Men of Antioch" (Valens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738b6d25e3d45b286163763fce9d1a5068fbb9a40b5f2eea813dc3db5e89568b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC2200974.
Handel: Theodora, HWV 68, Pt. 2 Scene 1: Air. "Wide Spread His Name" (Valens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327bccbd48edaea15283436cd696cb62fb53109980f72e1ee72f99cdbcba7eae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2200976.
Handel: Theodora, HWV 68, Pt. 2 Scene 1: Recitative. "Return, Septimius, to the Stubborn Maid" (Valens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5f6c737ba85349b89eec1e9e8676d68898103666778d850c5fa714e172b00e. 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/GBAYC2200977.
Apollo e Dafne, HWV 122: I. La terra è liberata
Handel: Apollo e Dafne & Armida abbandonata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08be9126a520a84ecd0a26e05d499c19e635c5440d1992e8c8f1a8f6345b878. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLE422105510.
Apollo e Dafne, HWV 122: II. Pende il ben dell'universo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc34572bf1a607e48a0b19d2a82160c372d1cfeb36d20a59d0f2e6d20a3eebe. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLE422105511.
Apollo e Dafne, HWV 122: VI. Che voce! che beltà!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffca5c70a82ad3f9857868aca82c411e46dbecf732d7836fb91dbfb82d9a203. 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/NLE422105515.
Apollo e Dafne, HWV 122: IX. Una guerra ho dentro il seno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4474e7d70dbe8109339deb20d4a56a288b4fe382bf47a65a6d6ee078d733ad4d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLE422105518.