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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55415910f94649b74f95b722de8412685b2e893aa699a242420ad7e4c2c26462. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81cdc15a-39de-43d3-9435-7006d0910e01.json and https://artists.proofprofile.net/proofs/artist/81cdc15a-39de-43d3-9435-7006d0910e01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lars Vogt & Friends Live in Heimbach, Vol. 2
Brahms: Opus 38 & 99 (Sonatas for Piano and Cello)
Fünf Gesänge, Op. 105 No. 1: Wie Melodien zieht es mir
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa44b8b302b2a0258edbbf937ffe65a74638536b99c0779d8c3aea40c49862a. 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/DES381811010.
Cello Sonata No. 1, Op. 38 in E Minor: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c06f6281657fbe1f9ac0eb5346f3172ee9298b927bb9784385b098527c8a09. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES381811000.
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 0xf33ddc86e52b43a9221df237ecdd0a99c8ccdd3ee48f370bfc09eaa57ff82918. 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/DES381811007.
Chisholm - Schmickler: Solo and Accompaniment
Adagio & Allegro, Op. 70: I. Langsam, mit innigem Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cab3090f53211cab40dbd8c3ead2643c244fb675097096863667978ed1139e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DES382311004.
Beethoven: Trios for Clarinet, Cello & Piano
Trio for Piano, Clarinet and Cello in B-Flat Major, Op. 11 "Gassenhauer": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76323b87456e28ac270bc9f4a0a3d173b723168f21ae8c953f746bef93f36eb8. 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/FR50X1740502.
Trio for Piano, Clarinet and Cello in E-Flat Major, Op. 38 (After Septet Op. 20): I. Adagio – Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1454bc682f0645739ff8f325f227a87604c7ab4bc7bed6ac13bcdf4a87a1c634. 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/FR50X1740504.
Trio for Piano, Clarinet and Cello in B-Flat Major, Op. 11 "Gassenhauer": I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0314385a80231a9ca2e54815bad1102ecfff3b839f54fed21cfcafab1f160. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR50X1740501.
Trio for Piano, Clarinet and Cello in B-Flat Major, Op. 11 "Gassenhauer": III. Tema con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90258618546ae513d5625a09225def9090cd5b7e199e76a50d749ed2e71999f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1740503.
Dvořák: Sonatine, Op. 100 - Tchaikovsky: Piano Trio, Op. 50
Dvořák: Violin Sonatina in G Major, Op. 100, B. 183 "Indian Lament": I. Allegro risoluto (Live, 2004)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deb090af51a43c2f4c5fdfeb3e51291a45236ba07ac7adc77f9f28c6cb5b5c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA340500296.
Dvořák: Violin Sonatina in G Major, Op. 100, B. 183 "Indian Lament": II. Larghetto (Live, 2004)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ffbaf44bdfa7966114aac487eaef7d6fa0935965774a1a658a09edaa28d1fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA340500297.
Dvořák: Violin Sonatina in G Major, Op. 100, B. 183 "Indian Lament": III. Scherzo. Molto vivace (Live, 2004)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b6688c76559dcc27066ec4883a6b0bef33a5d2ad5e7e613d17f2b46ffb5d8a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA340500298.
Strauss: Don Juan, Till Eulenspiegel, Don Quixote
Valzer sul nome Bach: No. 1, Circus-Valzer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc776c7c4450d0786e3d66c691b1f2757e743105d0b3cb767fba44dea6a7e0b3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X2074604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062d7db8decb7e591fddf7885fef19abf8f0932cb03f208f04e20a64aa2761e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2074606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30925cdb87c484f7ff1e19a80de0cd9179a7292b287a675c04f3d812196e825c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2074607.
Trio for Cello, Clarinet and Piano: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038dee3e6486ea663471df169b1729cd9437ba3028faabe6a2ebfe3835e8a448. 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/FR50X2074613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0462223688f6f0f8db044534f65b6069e5c527a0622a48240cbf75ea3ec9a84e. 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/FR50X2074609.
Penderecki: Music for Violin, Cello & Orchestra
Philippe Quint plays Tchaikovsky & Arensky
Hommage zum 200. Todestag von Joseph Haydn
Staatliches Symphonieorchester Kaliningrad / Königsberg
GAIA Music Festival 2015: Music of De Falla, Medtner & Schnyder (Live)
Concert de Chausson - Quintette de Vierne
Ernest Chausson - Concert pour violon, piano et quatuor à cordes en ré majeur Op. 21: I - Décidé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90468da22535683b724c96d1d072821f6df2cec5fff813797d5b38178367b11a. 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/FR07X2400131.
Ernest Chausson - Concert pour violon, piano et quatuor à cordes en ré majeur Op. 21: II - Sicilienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4134bb42eabef97f059145804056ea830bbaa18aba314b3fe52fbc6fd044fd. 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/FR07X2400132.
Ernest Chausson - Concert pour violon, piano et quatuor à cordes en ré majeur Op. 21: IV - Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17896b4f3cdca91eea538d2ed05ed6a7b512d27eea84d1bca89bd8ea9210b0af. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR07X2400134.
Louis Vierne - Quintette pour piano, 2 violons, alto et violoncelle Op. 42: I - Poco lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce9e5aacfa1e954be18cf17c4cb8dbbdf55eaf4de8dd15196b69640d552d41d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FR07X2400141.
Louis Vierne - Quintette pour piano, 2 violons, alto et violoncelle Op. 42: II - Larghetto sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd9adaeb0b0a470bb0f8fd20946a6cf02a9b02086e5b890a6a03ba9981a89f5. 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/FR07X2400142.
Louis Vierne - Quintette pour piano, 2 violons, alto et violoncelle Op. 42: III - Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86dd9ffa225a0d4d5effb8c5d228324f31c09ef994d35780b71af9a8125c03. 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/FR07X2400143.