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 0x8e452fca3d6d06c256a5f9333c30d323bce65808d724e568e50871c3be515439. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efa9d69f-6623-4a23-8ade-154ce10ed6ff.json and https://artists.proofprofile.net/proofs/artist/efa9d69f-6623-4a23-8ade-154ce10ed6ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sternstunden Vol. 2: 30 Jahre Symphonieorchester Vorarlberg - Live 2011 - 2015
Clarinet Concerto No. 5 in D Major, MWV6/36: I. Allegro
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 0x8cd8e8478f2eab510b786ef098e68ae7d2a9532ae4da53d89e32312d882a0f80. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/NLY330725411.
Clarinet Concerto No. 5 in D Major, MWV6/36: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2ee6cf9e4398bbae141bf8d5940c885a994a5e588702f54f1dd21a7bf057d8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330725412.
Clarinet Concerto No. 5 in D Major, MWV6/36: III. Tempo di menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32db216d49dfbccb96b44348f47830d2648d90d7798e3c55d94ab3e672ebc8b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330725413.
Clarinet Concerto No. 1 in A Major, MWV6/41: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab410f67f0815c96e8e940e6cfa2f0ad583f6a6419d5a5a7750ec78292c770c. 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/NLY330725414.
Clarinet Concerto No. 1 in A Major, MWV6/41: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00535d685f088201534623db660c4eaf7d442a8708ad71d0642a630f21cb70f. 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/NLY330725415.
Clarinet Concerto No. 1 in A Major, MWV6/41: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6826fba3069a408e8d862069f57903b6193fc8da031655fa76097395b87c1584. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330725416.
Clarinet Concerto No. 2 in D Major, MWV6/38: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c661bb9d36ac0fb6aff49eecd25f8f60ba08a602afad54ab1b5b0d3137a5a78. 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/NLY330725417.
Clarinet Concerto No. 2 in D Major, MWV6/38: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677cc3e90990d2b7ee183137576931e31c4fd7176c6811a48bb862046a145e4f. 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/NLY330725418.
Clarinet Concerto No. 2 in D Major, MWV6/38: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c2c29e2b97cfa3304b7aae7c3606259d477516466470d789818931f2975c1. 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/NLY330725419.
Clarinet Concerto No. 4 in D Major, MWV6/39: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe034b684bf3d813ff7723526a0945582b4623678d775c010d3164aefee2e800a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330725423.
Concerto No. 1 in C Minor, Op. 26: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be34c7345d8a0524bca0ac1ae5f68f03f6c50a577d4c3f4b8e77419971298b5. 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/NLY331400227.
Concerto No. 1 in C Minor, Op. 26: II Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ca19835df698378662723929c420d59c0ef962ad0aa407abfcd45a15f9232. 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/NLY331400228.
Concerto No. 1 in C Minor, Op. 26: III. Rondo. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854c0b170a879f5ec3f41672f9586611a3ac0296b785dd8d21682e39b5a9ba9. 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/NLY331400229.
Concerto No. 4 in C Minor: I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3b3d74401b9c51c2a0d28b87e494ed6c1ea6a99fd6d7e8ca43d904f3769338. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLY331400230.
Concerto No. 2 in E-Flat Major, Op. 57: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46733b9b3c0aa6afe36e211c3bd240beb7c8fc82789b04b00698ca931887bd62. 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/NLY331400233.
Concerto No. 2 in E-Flat Major, Op. 57: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6723eb62540ac68059af685d9355bfcf98d9b03f0658bd1cf8c3d8b34085583. 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/NLY331400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34166902070ea3f874de95b427cddd12bf671f8a2b98ab16272af18a1f6447d. 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/NLY331805039.
Clarinet Concerto No. 1 in F Minor, Op. 73: II. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8c17dd9f056e85167976d230424754feeb491d324144fc54dca8d82428fab8. 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/NLY331805041.
Spartacus: Ballet Suite No. 2: 1. Adagio of Spartacus and Phrygia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821aebe1a5af761733ee0db2c63c5ecf906da52b24dc6569826d3fc34ba78621. 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/GBF076210121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b72781e9890cfb5456180de8971bfa8858e99fed143915bae51dcf075b681. 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/GBF078341401.
Great Composers in Words & Music: Franz Schubert
3 Marches militaires, Op. 51, D. 733: No. 1 in D Major (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8124addd2fda47be14cb38ce1430e7b8a5e5ac57d87d46d38662fc2d84f9149. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192335722.
Piano Quintet in A Major, Op. 114, D. 667 "Die Forelle": IV. Tema con variazione. Andantino (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039d92f492165a757eff2f7879266909f96c0d0545ce9828b67689ab81a0a47c. 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/HKI192335724.
Wanderer Fantasy in C Major, Op. 15, D. 760: II. Adagio (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba5504492a946bce073cca84c94ce28210af36ce5adaaa5fa5ae7cb947f4fb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI192335728.
Skona Grona Dagar (Beautiful Green Days)
Concerto for Oboe and Violin in C Minor, BWV 1060: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbafc454b1ff6d847fab41c079517f058516a7df5d74d8e48f639b106ac321e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199711314.
Herz und Mund und Tat und Leben, BWV 147: Jesu bleibet meine Freude (Jesu Joy of Man's Desiring) (arr. for organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aceb52af3c7ecb0254377bf6af61b38daa1c4ac1121e1ab2b4dfee1c4a4c69f. 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/HKI199333913.
Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5cb6f9704da25241f51e19768e8de39c7cb9b3d6bf2a4a2dc2824ad292befa. 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/HKI199207108.
Canon and Gigue in D Major: Canon in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c1d507bcdeb43fd98ec34e68f400efa0209014da98723472fd3c244f32a0ad. 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/HKI199202613.
Antiche danze ed arie per liuto (Ancient Airs and Dances), Suite No. 3, P. 172: III. Siciliana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a0078cea1a14acac46ebdb161862feafed55ce8053eef0304543fdc16421d2. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/HKI199603811.
Beyond Beethoven - other music from his time
Symphony No. 9 in D Minor, Op. 125, "Choral": II. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28703b8db523e40becf772971be9001dcbf091367f24bc14dab0bc5724999fa. 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/HKI199217102.
Don Giovanni, K. 527: Don Giovanni, a cenar teco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afef0235eb8f5eeae03071e5df1faebb1b83d3c79f57a961b3f5c394d06614b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1612272.
Dvořák: Symphony No. 9 - Symphonic Variations
Eggert: Symphonies Nos. 1 & 3, and Incidental Music to Svante Sture
Donizetti, G.: Lucia Di Lammermoor [Opera]
Tchaikovsky: Serenade for String Orchestra, Op. 48; Souvenir de Florence, Op. 70
Souvenir de Florence, Op. 70 (Arr. for Orchestra): II. Adagio catabile e con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b9ce9c9d5e1bd502fee43dcf3c0e2b8e9e0f280cf3190fee214ed3e534618. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059202132.
Tchaikovsky: Serenade for String Orchestra, Op. 48: II. Valse. Moderato. Tempo di valse
Serenade for String Orchestra, Op. 48: II. Valse. Moderato. Tempo di valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72af8909d16055ede6847afd3eec9b1379f7f5deb86be841a8d1e7e7b0d8534. 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/DEF059202121.
Végh: Salzburger Mozart-Matineen 1988-1993
Patsch lernt Zaubern im Zirkus Strawinsky. SWR Young CLASSIX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afdc4de2148433cf1e9463043c632c43085ffb9f0c1d7c185ab62074b0c821c. 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/DEQF41316005.
Sternstunden: 25 Jahre Symphonieorchester Vorarlberg - Live 1996 - 2010