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 0xcc20ac43245b62f1aaeada9ae326f1ce8e9f466ceb3d5d0ed98b570eb933799a. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8db4dd33-c2fc-46c8-afcb-bc06125925b1.json and https://artists.proofprofile.net/proofs/artist/8db4dd33-c2fc-46c8-afcb-bc06125925b1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Bloch, Dohnányi, Bruch, Tim Posner, Berner Symphonieorchester, Katharina Müllner
NACHHALL - Othmar Schoeck Orchesterlieder
Rachmaninoff: Piano Concerto No. 2 & Babadjanian: Heroic Ballad
Piano Concerto No. 2 in C Minor, Op. 18: II. Adagio sostenuto
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 0x5274825d77b1e5d70253fc4723cb337dbe3be1387bdc6be377388c4a75d98fee. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1262200402 — a six-check JSON result.
Kurt Leimer: 3. Klavierkonzert (linke Hand) / Richard Strauss: Panathenäenzug, Op. 74
Haydn: The Seven Last Words of Christ, Hob. XX:1
The Seven Last Words of Christ, Hob. XX:1: I. Introduzione. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1344c206a87fc7c7bb6547d92da382eef42f57ea40c57003e48bb8fd59fbf6a9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CH1262091101 — a six-check JSON result.
The Seven Last Words of Christ, Hob. XX:1: II. Sonata 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24972fdb1a7381dd3e9d7c0f1c8906fdb5c9bec1b78d749e4807d61e83561170. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1262091102 — a six-check JSON result.
The Seven Last Words of Christ, Hob. XX:1: III. Sonata 2: Grave e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5251605338904d8957bc96d9773a69dc1e1dc0e3b6b97e2d29efa7e8abc592b2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1262091103 — a six-check JSON result.
The Seven Last Words of Christ, Hob. XX:1: IV. Sonata 3. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f38a0fa62fc23460166cc639baa5dda1cb0391948fbc4ad1c0826287da0d981. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CH1262091104 — a six-check JSON result.
The Seven Last Words of Christ, Hob. XX:1: V. Sonata 4. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a5e3c0dcd9f4bc313f15c74860c317db25402c018f4a0f0247f1691aac587e. 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/CH1262091105 — a six-check JSON result.
Cello Concerto No. 1 in E-Flat Major Op. 107: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd8d59a296dd7f102cff270213feecb4967aca38860101f138255a4bc680ba1. 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/CH1261890101 — a six-check JSON result.
Cello Concerto No. 1 in E-Flat Major Op. 107: II. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9b38c09b303694544f5e7442f9f410cd52177ef5a8fbc9f9c397ad7594bae0. 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/CH1261890102 — a six-check JSON result.
Cello Concerto No. 1 in E-Flat Major Op. 107: III. Cadenza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb9f69aa30a972260f719eaa6d9eb1c51845f8f8d089ec43edc30e8aecdae73. 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/CH1261890103 — a six-check JSON result.
Cello Concerto No. 1 in E-Flat Major Op. 107: IV. Allegro con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c6f4313ab5a28dd361965330a5226a1d752d028d645b8ce2f0354d6871b88e. 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/CH1261890104 — a six-check JSON result.
Fantasy for Cello & Orchestra Op. 52: Adagio - Andantino leggiero - Allegro con fuoco - Cadenza - Andantino leggiero - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959ad9b9e14c3ce5ff518e57783e400a2411a1030ccf03f7171fd15070c0e68e. 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/CH1261890105 — a six-check JSON result.
Othmar Schoeck: Das Schloss Dürande, Op. 53
Honnegger: Symphonies Nos. 3, 5 & Mouvement symphonique No. 2
Schoeck: Sommernacht, Sonate für Bassklarinette, Penthesilea Suite & Besuch in Urach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5b0a798c4f600880251334d814be087c173eacdef81c1a02f7bd02e9ea185c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CHUM71001060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1858e801c605f370ae85fe8714380415a2db0133a06498498b9b053e9c5e0ce3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CHUM71001061 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5b77df4187b8b508f967cb288e3e8001a892d272186359f4e0926b53ff7999. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHUM71001062 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae64d60ce4efb0e9923e23d50658b7c71b9349fb546ec1832d9041af0916b3e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CHUM71001063 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204fee0698e9f7d57fd4fe2a19841664f5b3ef542b2b59008bc638dcf732e648. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CHUM71001064 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580d8eb01081f65142b3095bb8ccead17419ca1188e16aa5276e8493054f115. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CHUM71001065 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e02b11bcc0d5b551a571618c5b0d95811f449e76a2d567da49b1b080b1b341. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHUM71001066 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bf468ab866a3fbdd1660b6a966ce7944d07886c383d2370958d87247283b0e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CHUM71001067 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ef79b3fab2e6e07ecdb1169be1d6b2c5c9515eaecc2a1733005a26d878cbc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHUM71001068 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98f86ac89b52cd84c7278c9d53959096d195b007d47a5d026459b8e343104f0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHUM71001069 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaab43b00e3b901e81df53757c86b704c16b192aef46c9e7ea0eba1e53ec6a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHUM71001070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9103361de358f6ab8b8edf67a7511fd0e7976129750bf354b96eedca7a766c84. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHUM71001071 — a six-check JSON result.
Reinecke: Symphony No. 1 in A Major, Violin Concerto in G Minor & Romances
Schumann: Spring Symphony; Overture, Scherzo & Finale etc.
Symphony No. 1 in B-Flat Major, Op. 38 "Spring": I. Andante un poco maestoso – Allegro molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e33326262a6b0682556b7845c7f3ee12a1042380c1541e4c00c44d23c53ffe. 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/GBAJY8802001 — a six-check JSON result.
Symphony No. 1 in B-Flat Major, Op. 38 "Spring": II. Larghetto –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a80c1fd35b1c4a426c180af29b68a4735a860c9afcf0510ced4a8da0b587ec. 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/GBAJY8802002 — a six-check JSON result.
Symphony No. 1 in B-Flat Major, Op. 38 "Spring": III. Scherzo. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdbda5242f59bef6821d24017ee3af1e29a4bc09b40251a6a373e501c4abe42. 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/GBAJY8802003 — a six-check JSON result.
Symphony No. 1 in B-Flat Major, Op. 38 "Spring": IV. Allegro animato e grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419fdee8196b55df713e5628e91cb23aefd007ef215fdd5899811d2ccdd82c08. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8802004 — a six-check JSON result.
Overture, Scherzo & Finale, Op. 52: I. Overture. Andante con moto – Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bb2f9e096731322e7d50298d4d194719d2274ab23df2f856ab32086a9e0e3e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY8802005 — a six-check JSON result.
Piano Concerto No. 2 in C Minor, Op. 18: III. Allegro scherzando
Milestones of a Legend: Georg Kulenkampff, Vol. 10
Fauré: Requiem, Op. 48, André Cluytens vs. Michel Corboz (Compare 2 Versions)