Martyn Hill (b. 14 Sept 1944) is a British tenor. Life and career Hill was born in Rochester, Kent on September 14, 1944. He studied at King's College, Cambridge, followed by the Royal College of Mus
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 0x40ea94c00f454c8376f9f2e30fc356b75d25351a23092683e24697982d80d2f5. 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/5f8e55e3-c608-4871-867c-64ecbf7d69b9.json and https://artists.proofprofile.net/proofs/artist/5f8e55e3-c608-4871-867c-64ecbf7d69b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 1a. Kyrie eleison
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 0x3c9d3e4934f276b60be73510cb65a74f0ffb870a77640fc9bd841ad42ff04855. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077940301.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 1b. Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30794e3b215b6afa2e6ca1052c4a572fe580f9054bb09f477c6f5b88a38c85b5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBF077940302.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 1c. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e72a5cf5fe617ea0a964cfca8847277a39a3e4fefd77a68a0972d80ae3995ab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF077940303.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 2a. Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542b75cfc1f9e0a89748eb2ab8ca93712447c3f7d5b780061fd5160a7448a0c0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077940304.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 2b. Laudamus te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f2fc8355f1f3e14169d74fd1eb184aae884f2a2f3d4a04d031191f29f2249. 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/GBF077940305.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 2c. Gratias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b693fd435493919e4a21056aa8a50bc71fab14bb9d5250f0ba2755b491ffe36. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077940306.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 2e. Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9e14eeddbfd6e016e87ddff1bda29121bde25bf6631447032461f0c0327d34. 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/GBF077940308.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 2f. Quoniam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3358cd0114e064841580c4743146cbd874c958d78eebd3aaa710780b135b1e29. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077940309.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 2g. Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d65a03f7de1c8e937c7e4d9628c7f37262375449370fc608ead2ad7550207. 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/GBF077940310.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 3a. Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac78ef0d24fdbaea745edafd607aaac993a01d00b3de1b7a38418d828601e3. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBF077940311.
Missa Sancta Caeciliae (Missa cellensis), Hob. XXV:5: 3c. Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1b95540f53852ac2e0932d601b2eef119c609ad2a156f53774c8afbb5139e1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077940313.
Britten: War Requiem, Sinfonia da Requiem & Ballad of Heroes
Sinfonia da Requiem, Op. 20: I. Lacrymosa. Andante ben misurato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350a85493d2a5686aa91396792ff2ea3d1f40476d2caacb22937240d8395377. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBLWD9108802.
Ballad of Heroes, Op. 14: I. Funeral March. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691ca371cac15d9ccf2503856916b49cbdabeca18fc7477cfd25fddd494b9e7. 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/GBLWD9108805.
Lili Boulanger: Songs (Hyperion French Song Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb32036a1a58d214bb0baa8eeb7430542126f73d075b6e21387b95254c0a20ec. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9472614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aaee52babcd24a7abea7db98c537ca1984bcc9c89266b8c34cd7b2747581f4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBAJY9472615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe21efc757ca3bd704ca45887dec59b97115676ebedb8d1f0f70b7264032ea4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY9472616.
Vaughan Williams: Serenade to Music, Flos Campi, 5 Mystical Songs, Fantasia on Christmas Carols
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3709ad43a738b6adf7cad60e665d4081a60244e0e32c727bdf5fd4c779e611f3. 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/GBAJY9042001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fa7da39fbd698f61cd81fab07551f5704f5ddcb956a717d1f4e21e8f147ab9. 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/DEF057502520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0e971f40dc38306ca2d419ee516f1a7dbf7d700c935e7a26532f3a5317090. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEF057502530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491a1a672daf237e5fa0969a16c2134c9870fd5dbe3323596966c506aa5d1a2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEF057502680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a23c6c8905cf0b60de6601c2ff6fd5f45d2518bb78c5e0da51255d2768225d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057502400.