John Mark Ainsley (born 9 July 1963) is an English lyric tenor. Known for his supple voice, Ainsley is particularly admired for his interpretations of baroque music and the works of Wolfgang Amadeus
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 0x274ff2d70c98a40dc44018d5b73f002b6d290b3b3c77d0b503d872cff1ede374. 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/e56dc9ef-6b50-452a-a6d5-2a091a99cb65.json and https://artists.proofprofile.net/proofs/artist/e56dc9ef-6b50-452a-a6d5-2a091a99cb65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'Enfance du Christ, Op.25 - Partie 3: L'arrivée à Sais: Trio pour deux flûtes et harpe
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 0xbd369f269c310fb404842beef0ce7acff39eb5c31a109dcca114fc467a8fa32a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBBBB9500616.
Sara la Baigneuse, Op. 11 (Ballade H.69C)
Choeur de l'Orchestre Symphonique de Montréal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4672972b5ccf30b93b3671212d3d64229c896f6f49d10f597921da0f4926d4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBB9604601.
Gilbert & Sullivan: The Pirates of Penzance
The Pirates of Penzance, Act I: Opening Chorus of Pirates and Solo. Pour, Oh Pour, the Pirate Sherry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11486a05475c0ff333ce4785a19fe74f9a308d885a1da84d0a1147710239200. 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/USTE10701353.
The Pirates of Penzance, Act I: Song. When Fred'ric Was a Little Lad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68c09aa5095961dfd0c81e23ad0bd62554c05c4d450a51c0eacbb2066e3c831. 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/USTE10702353.
The Pirates of Penzance, Act I: Song. Oh, Better Far to Live and Die
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5deb4920e269f321feeede544b70c663e1c9eddb795a81166a41f4fd72eaf5. 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/USTE10703353.
The Pirates of Penzance, Act I: Recitative and Duet. Oh! False One, You Have Deceived Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb1fa02889f121c643a847ac4478d558835e6fbb9eca19062d244405b0f30f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10704353.
The Pirates of Penzance, Act I: Chorus of Girls. Climbing over Rocky Mountain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376a23c0dfe522c6a1b2e7033d937ed2efa7c46dc2f481fdd0443ee9b97ea718. 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/USTE10705353.
The Pirates of Penzance, Act I: Recitative. Stop, Ladies, Pray!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f698663cade32bf4f365b3af0c1cec8d4e172156269d709bc1a396201b9a3. 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/USTE10706353.
The Pirates of Penzance, Act I: Song. Oh! Is There Not One Maiden Breast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc2c311ae9f03022b7da1da518686a6e2927611b3808178363a29778e6d559. 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/USTE10707353.
The Pirates of Penzance, Act I: Song. Poor Wand'ring One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a00c1a41bae30f416557300afa23e62b384491fb1826fc2ef26b0868aff8f2. 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/USTE10708353.
The Pirates of Penzance, Act I: Chorus of Girls. What Ought We to Do, Gentle Sisters, Say!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a78f2f071a021476f6be48f627f7c31a41c8b63d62a592a05d664220209eb6. 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/USTE10709353.
The Pirates of Penzance, Act I: Duet. How Beautifully Blue the Sky
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa510fd823e89391af2eee8f70c5777a7e6dc01727410a2849e3769f6e3e25da3. 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/USTE10710353.
The Pirates of Penzance, Act I: Solo with Chorus. Stay, We Must Not Lose Our Senses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e111d7fd47ad9029dc185a4a7f245018f26667c8c55cc27efad2002703b5507. 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/USTE10711353.
The Pirates of Penzance, Act I: Song. I Am the Very Model of a Modern Major-General
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2b4f46bab2a1b874aad1e862406864419ee5494c260e0f2e17d8d3c8c81186. 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/USTE10713353.
The Pirates of Penzance, Act I: Finale. Oh! Men of Dark and Dismal Fate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe9566ea75ec66e8daafdb13905bed259400f948ffbe6ca2f9eb97ab1da15be. 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/USTE10714353.
The Pirates of Penzance, Act II: Introduction and Solo. Oh! Dry the Glist'ning Tear
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b035396b0c73cc50dfc6d13b468504c4c48760042b739d330ee1d03e366f8b0. 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/USTE10715353.
The Pirates of Penzance, Act II: Chorus with Solos. When the Foeman Bares His Steel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbb9015c5dfb17d5f07981806ff189bddafa7a1c1b7bc28a56ef8ad71537ca9. 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/USTE10717353.
The Pirates of Penzance, Act II: Recitative and Trio. Now for the Pirates' Lair!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2371840d047c9f70c6cc4776088d0afd0454c267623bf981a59efc4661f6599. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10718353.
The Pirates of Penzance, Act II: Trio. When You Had Left Our Pirate Fold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36ab2b2d24850bb851321177a4db462f6bd53854a8939896be02f12740d333e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USTE10719353.
The Pirates of Penzance, Act II: Recitative. No, I'll Be Brave! Oh, Family Descent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce4bedef587f61c090490adc9888af444cb07d45755560b436d40aa1225c4c3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10723353.
The Pirates of Penzance, Act II: Song. When a Felon's Not Engaged in His Employment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b07fb5a9ed9d690f2bdd2b050b7d5ae46f444ae7680fb7ff6183867d2bf3409. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USTE10724353.
The Pirates of Penzance, Act II: Solo. With Cat-Like Tread
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1d28aa9b34527d23e4d9561c00cf75b8b38139bd242d72ab1c717ae51159d0. 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/USTE10726353.
The Pirates of Penzance, Act 2: Song and Finale. Sighing Softly to the River
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63b72bf92d98e71ce9d265b3fea0b6fec67d1fd2572f67708e77308e8b92c1d. 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/USTE10728353.
Finzi: Dies natalis & Intimations of Immortality
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1bff91fcc4d4cde40818b091c55c16b46d01f048e3018b1238330238e2a1eb. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBF079642908.
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.
Welcome, Welcome, Glorious Morn, Z. 338: I-II. Symphony – Welcome, Welcome, Glorious Morn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e2eb963fcff1024833864e1861e6d2ca235b7ac2edc91b6642498119b17f24. 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/GBAJY9401501.