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 0x089bdff37c3098b2af02b1164f72fbbb8954fac4192e07a03d467bd866318c68. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f279f96-01d9-4d9c-a458-39dd45247fb1.json and https://artists.proofprofile.net/proofs/artist/7f279f96-01d9-4d9c-a458-39dd45247fb1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Twentieth Century Flute Concerti: Poulenc, Nielsen, Ibert, Honegger
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 0x62c725ce3145c95c330854ea694a9de51ab133de9d12ecaa5956e93018fbcea1. 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/USX761734701 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d778707f43599694fb640d311c4cd9626e061792c9173201099adb242f030c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX761515305 — a six-check JSON result.
J.S. Bach: Complete Flute Sonatas & Solo Partita
A Contemporary Collection: works by Damase, Persichetti, et al. for flute and harp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537b88bea4b9f1cd2c687e9c95c3a761ed4f72783c06565929330997c24fe1a2. 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/USX761001065 — a six-check JSON result.
Vivaldi: 6 Concertos For Flute (op.10); Concerto In A Minor For Flute, Rv 440
Six Concertos For Flute, Strings And Continuo, Op. 10: No. 1 In F, Rv 433 "la Tempesta Di Mare"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc164568d3de4ab84f675e7cce6e23a37099945a1aa69e2cdb38f00b2250c54. 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/USX760905901 — a six-check JSON result.
Six Concertos For Flute, Strings And Continuo, Op. 10: No. 2 In G Minor, Rv 439 "la Notte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150aa19e4a84e226b7a1461790492efbbfe1d37b411a79cc3fe4aba62b2eb1d4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX760905904 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db7ec9980a442de18396b156b01aa041d90eab38d1d0a950aa997858182fb96. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USX760905905 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf118e973d51322223e9bc29d3df6513a08c88714dcc397065a407327ba9da4a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USX760905907 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81edb64cd62f815269830ad78cd2d33f4360c7b6b1507dabc95e7e2e3f24ad3. 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/USX760905909 — a six-check JSON result.
Six Concertos For Flute, Strings And Continuo, Op. 10: No. 3 In D, Rv 428 "il Gardellino"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355d6d605d53d48dadfe96f78410a52d2424dd06013fb93d2cdd52a5dbc0fb79. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX760905910 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d9a2b3ea5fac02e9d5c1ea20423ca158d1c2aaecce6db02852b3698658863c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USX760905912 — a six-check JSON result.
Schubert: Arpeggione Sonata, Introduction & Variations & Beethoven: Spring Sonata
Mozart: Concerto for Flute & Concerto for Flute and Harp - Rodrigo: Concierto Pastorale
Flute & Harp - Beautiful Classical Duets
The Carnival of the Animals, R. 125: XIII. The Swan (Arr. for Flute and Harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447ab0a530a2bdd44fb7978011fda55e91a3c64c5abe859bacf4539329b19aae. 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/USX761002909 — a six-check JSON result.
Chill Classical Harp - The Most Relaxing Masterpieces
Presto! Vivo! Vivace! The Fastest Classical Music Ever
Jocelyn, Op. 100: Berceuse. "Oh! ne t'éveille pas encore" - Arr. For Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08497216414755bb1822c874df574f3a6a5b4327f0b946d0bdde02e052902a3. 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/DELV41700472 — a six-check JSON result.
Sonata in E-Flat Major for Clarinet and Piano, Op. 167: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1b41c2fdac9e721b85aaf2d107632a76f33ae7fd1958e56ef1fa769266dcd7. 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/DEA580900519 — a six-check JSON result.
My England - A Collection of Timeless English Concertos
Concerto grosso in D Major, Op. 6, No. 4: I. Adagio - Allegro
Südwestdeutsches Kammerorchester Pforzheim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8680c144367c5073ec6218ae684fc821d067823adc5f197e7fc00dcd205a05cf. 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/DEA581300044 — a six-check JSON result.
Concerto in G Major, RV 151 "Alla Rustica": I. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7e30e2078480ed56de2e6441001dd71429fa96f39d65499b63495a237f7fc1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEA580601816 — a six-check JSON result.
Classical Christmas Fireside: Warm Romantic Pieces for the Winter
Suite for Violoncello Solo No. 1 in G Major, BWV 1007: V. Menuet I/II/I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323cac1746e060af4f68bc61bc77aaefb328882371f247d878f9870fa575beee. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEA580600616 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a765b754914ba0746cc21faa0874b710846b3b5ef5b951b511180552f714ea. 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/USX761009002 — a six-check JSON result.
Le Nozze Di Figaro, K.492, Act I: I. Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb818adc7d264b745f8bf3fd10de92cc953a364e5bee13f571fbdf1408140b8. 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/GBQRF1341874 — a six-check JSON result.