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 0x3396f76de0084c479bdcc519cc0e309701b07805ce7a2a167ddf1fcc71b0096b. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2e7e106-c564-425f-97d4-ff18c6d6fc76.json and https://artists.proofprofile.net/proofs/artist/c2e7e106-c564-425f-97d4-ff18c6d6fc76.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Opera Arias (Arr. for Flute, Oboe and Piano) - Delibes, L. / Puccini, G. / Offenbach, J. / Gounod, C.-F. / Mozart, W.A.
Lakme (arr. for flute, oboe and piano): Lakme, Act I: Viens, Mallika … Dome epais le jasmin, "Flower Duet" (arr. for flute, oboe and piano)
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 0x4f8006b425625be75f92627adfef75666bd69efa3afb9b0548b295a1b40d0af6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USASX0861104 — a six-check JSON result.
La rondine, Act I: Chi il bel sogno di Doretta (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78825a2cbb3f8c1755fd0e7f26b77c9dc9b22630fa688a8386187052b2c9bfb. 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/USASX0620902 — a six-check JSON result.
Les contes d'Hoffmann, Act II: Belle nuit, o nuit d'amour, "Barcarolle" (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567d938ec7f103291ad6565d2c6f27afd5751b5c524479d204b7291939dcefa. 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/USASX0861108 — a six-check JSON result.
Romeo et Juliette, Act I: Ariette: Ah! Je veux vivre dans le reve (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6155d1e62b35a71e8e05448d69ee5bfb33c290a108bf68eebabf0686a8afb19. 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/USASX0620904 — a six-check JSON result.
Le nozze di Figaro (The Marriage of Figaro), K. 492, Act III: Duettino: Sull'aria che soave zeffiretto (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e7f09820ff0be4a6a4e7945bd6445d3cf801aadb946eba9f157f8e4eb7a88e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USASX0620905 — a six-check JSON result.
Norma (arr. for flute, oboe and piano): Norma, Act I: Casta diva (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270a5ccee7662511bdb9880dfbdf53a8b5ad58cef79881947fc3b043fe56c379. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0620906 — a six-check JSON result.
Samson et Dalila, Op. 47, Act II: Mon coeur s'ouvre a ta voix (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7c4d4992d21d3c8143875470fe83c98778fa637f01749760f8f0abdbf42799. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0620907 — a six-check JSON result.
Carmen (arr. for flute, oboe and piano): Carmen, Act I: Seguidilla: 'Pres des reparts de Seville' (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cabd16e1737650eeacc36743ccabce861504fabd853c564ad777c7e8e439366. 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/USASX0620908 — a six-check JSON result.
Die Zauberflote (The Magic Flute), K. 620: Bei Mannern, welche Liebe fuhlen (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283c220c01fae64ea7cf87016c9e05002c2cd9a7aff07a7fdee292ade713863. 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/USASX0861403 — a six-check JSON result.
Gianni Schicchi: O mio babbino caro (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382889df3664aa4a9707d1dba5c11280b848de66d3e93a7086381ec06d9ca4a4. 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/USASX0620910 — a six-check JSON result.
La boheme, Act II: Quando m'en vo' soletta, "Musetta's Waltz" (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca68f6041339d599cdff65615d1326c46f4d051937bfd8a82c7aacb6ebb3709. 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/USASX0620911 — a six-check JSON result.
Don Pasquale, Act III: Nocturne (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddbbb11a9dca39439455f9c15336adcad18b650ef8ce6302f55d7b68bb35d8c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0620912 — a six-check JSON result.
Adriana Lecouvreur, Act I: Del sultano Amuratte m'arrendo all' imper … Io son l'umile ancella (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6311fececb93ace900834185c8b1b53763e141ad6e2044dccd51885bfb52ab3e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0620914 — a six-check JSON result.
Giulio Cesare in Egitto, HWV 17, Act II: V'adoro, pupille, saete d'amore (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd5cb4cdf776a25e667daeb61a90e87eb99359ca14928f051f337eb74401bd1. 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/USASX0620915 — a six-check JSON result.
Serse (Xerxes), HWV 40, Act I: Ombra mai fu, "Largo" (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2909ac642eb5420faa1a713e1372af2187a95c908cf3f4623999d3af92f49ac1. 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/USASX0620917 — a six-check JSON result.
Die Zauberflote (The Magic Flute), K. 620, Act II: Ach, ich fuhl's (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547ef5b8d3f27c3455c1300998b2f2d23c01a57bbdbb20c9a24a313aa68ad8c2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0620918 — a six-check JSON result.
Madama Butterfly, Act II: Un bel di vedremo (arr. for flute, oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6d042312040f4113dc351bdacd1095362f140efb22d18d757adc1e66c16066. 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/USASX0620920 — a six-check JSON result.
Day In The Life Of Leo (A) - Classical Music for You and Your Cat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9021315221386bff2f1de76565075d3459ed15a39ab08b4a68f309c3b215f9ba. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USHM91423136 — a six-check JSON result.
Green Places: II. Nightblooming (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9e9a537a9cadae90fcf565709d792df4cfbbb83d0a2faf4b5310ca7069c96f. 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/USHM91423139 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f821d63f110e6050775b597bf3e1d773df229967b242c4b9119d7c50de7745. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USHM91423141 — a six-check JSON result.
Three Dances for Two Flutes: I. Easygoing (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832eb140b21fa39c4458de7642ab400519b3cf6219df88f372ccb54e0a9063f9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHM91423148 — a six-check JSON result.
Three Dances for Two Flutes: II. Moody (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43f3d484fa500bde04597b9c774052356b19e63ad620ff4106a0457c3b4c7c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USHM91423149 — a six-check JSON result.
Three Dances for Two Flutes: III. Coffee Nerves (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c2b701370f29b9d0a39b96c438ccdcea0c48c5766bcecd51a97bcbd5be68be. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91423150 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b879245544d6e7c09ce44868d8d95704a03256cae8a5328121f4f82ab1c1b30. 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/USHM91424652 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15401b36cb55d39c0c43928a3dc87022242f2c9b7eec5c517da4628beade1ca6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAB10620530 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f83cb652c36bcd88faf201b63f460a5c6a084278ae8b937bc9ccc57a000d55e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USA220611776 — a six-check JSON result.
General William Booth Enters Into Heaven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b52848566e0b7e993692354091ad536b89a3ebe6ad72a535157292df9d59d7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USAB10620412 — a six-check JSON result.