Leontyne Price ( ; born Mary Violet Leontine Price, February 10, 1927) is an American singer who was the first African-American soprano to receive international acclaim. From 1961 she began a long ass
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 0x441bc999d12303d89496aecfc1d351a026ac378e79f121e60dd00371eb612adc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bac49974-ce6e-43d2-9138-92c80b5dc54b.json and https://artists.proofprofile.net/proofs/artist/bac49974-ce6e-43d2-9138-92c80b5dc54b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Il trovatore: Act I: Tacea la notte placida (Leonora)
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 0x7e4e2bd3a67d54f7db060f09d253bde7c8a77f4df0484f078a77b3fe5b850950. 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/ITCC51101476 — a six-check JSON result.
Il trovatore: Act IV: Se m'ami ancor (Manrico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d503c4a7d1ee5c6726807789da72572e3665c2b9629d5106197de621494760. 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/ITCC51101508 — a six-check JSON result.
Porgy and Bess - Act One, Scene I: Introduction - Live
Choir of the Blevins Davis & Robert Breen production
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db81f6861b744b549068f61689232d1445114ec80bb1dbc9b76a92a590722dd. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEE210840501 — a six-check JSON result.
Porgy and Bess - Act One, Scene I: Summertime - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b58c6cca899d0488c65ea461bf970b6015da8cd8093a9e8dc7a02b79a79deac. 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/DEE210840502 — a six-check JSON result.
Porgy and Bess - Act One, Scene I: Lissen to yo' daddy - A woman is a sometime Thing - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9e341c2113bdcc13416392e40785fbbab89f914be67a7951e8983d60093d15. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEE210840506 — a six-check JSON result.
Madama Butterfly: Act II: Un bel di vedremo
J'aime pas le classique mais ca j'aime bien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795fd4dba043c87e5d667dc658d7b8dfb7be0b55dce0234fcc6d553c300388e9. 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/USBC10200468 — a six-check JSON result.
Così fan tutte, K. 588: Act I Scene 6 - Soave sia il vento
Mozart: Cosi fan tutte - The Sony Opera House
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffb0e78abb2b9976d33ba38d904e2cc0d796724fc7e0b78bbf65c963cb8d7a6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10601192 — a six-check JSON result.
Ich mag keine Klassik, aber das gefällt mir!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795fd4dba043c87e5d667dc658d7b8dfb7be0b55dce0234fcc6d553c300388e9. 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/USBC10200468 — a six-check JSON result.
Je n'aime Pas l'opéra mais ça j'aime bien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde94e46d3884b6aa47fda21ba513dab4aa3793557e781429618edf22dd13b0bf. 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/USBC17100232 — a six-check JSON result.
"Ave Maria" Ellens Gesang III, D.839, Op. 52, No. 6
Música Clásica 50 - Lo mejor de la Navidad: las piezas festivas más famosas de orquesta y coral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b1d026256a8ab91e746728fa89512a4be97d50e3e5b46af8543fae16d5e166. 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/GBG3H1210719 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc242f51897cf8184ee85d2ead49d138767344baaa857bb3ca84e8dc5e8ddc3b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USBC16300180 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f81e0250ec592091f59381bb27b4078fad94a5a02ebb9cd7abd26250481926. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USBC10400246 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbae0226d8f41a64ff7e36dbfe0697e577d2bb695151cf0ba9ee6f6e7e1b03b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USBC19704782 — a six-check JSON result.