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 0xbc2b2eb87397b8ebfc6fbc4e2bced2918f772bc789328ae7a76d37c8b607ed8d. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b613f59e-0cb6-40ea-810f-81b901027315.json and https://artists.proofprofile.net/proofs/artist/b613f59e-0cb6-40ea-810f-81b901027315.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Violin and Oboe in C Minor, BWV 1060: 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 0xb2c3a25f1b203697b16e46d8fb18474c275cfb7fd49463146433e7e6e4b1a963. 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/GBVVQ1024016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc17b88121a471078b550e04c0b8170d54c451779b43f4c1bcdcba54dcbab4bc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBVVQ1026979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc17b88121a471078b550e04c0b8170d54c451779b43f4c1bcdcba54dcbab4bc. 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/GBVVQ1026979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cf83ad8352bd9e2284a97fa540d87a65dd02d39b9edef695d43b06d7340df3. 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/GBVVQ1026986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa642037bc15bb54077f520a6e26cfca0267f098878259fc0d770a4be3cc679. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBVVQ1026987.
Coleridge-Taylor & Harrison: Works for Violin & Orchestra
Holst: A Winter Idyll - Elegy - Indra - A Song of the Night - Sita Interlude - Invocation - The Lure - Morning of the Year Dances
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86622333aab05ea6631e912158bd06efbeba2c472469e94eefea1099fb20324c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USB8U1611873.
Spiegel im Spiegel (Version for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ee3c49d06b77802b8f515b7479b53c9a6403c876b6d4d85f2499ffe33e90da. 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/USB8U1611850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6073f9b7d32fc0d3215005d828caaf39382a4438e0c18faf2fb436f7d43ac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1611876.
The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": I. Allegro non moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5914007eb24ceaee5982b8818b09dad0c23071c4ebe2a7d6b9a902b26a2bce3f. 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/USB8U1611883.
Britten: Violin Concerto / Canadian Carnival / Mont Juic
Vaughan Williams: Piano Quintet, Quintet in D Major, & 6 Studies in English Folk Song
Piano Quintet in C Minor: I. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb18060b8519acbc0ca77a78d07493e9c8c9c48ed8201166009c7a42f4b832c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191405001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebed9915d91622a16dc053e5fd4b2f5f71fbf442b2b2c2b4999763f2478eee8. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/HKI191405002.
Piano Quintet in C Minor: III. Fantasia, quasi variazioni: Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8771038f09cc3121a4b403416523ea73f9589dae791c670da675465fc2b20ec5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191405003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d3a744880f924e6f3994978c4a41d7e705f528f62f246c80047415a84a1860. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/HKI191405004.
Quintet for Clarinet, Horn and Piano Trio in D Major: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c469cdeaff6774e62b5961e7f141c28ac1beb5734b5b7cfd899b83109175c28. 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/HKI191405005.
Quintet for Clarinet, Horn and Piano Trio in D Major: III. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93932fe793db08707d6ac1fbc5ce71249be04b9eef7bc95ee827696005490b5a. 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/HKI191405007.
6 Studies in English Folksong (version for clarinet and piano): No. 1. Adagio (Lovely on the Water)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf386723d1d14b2ea7af025cae0963ed05cae3db0d224f2f382c34dafdb38a043. 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/HKI191405009.
6 Studies in English Folksong (version for clarinet and piano): No. 2. Andante sostenuto (Spurn Point)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81bba148725c1e25952288eddc604b5a8b8cb11d36be3e9c3a69fefc5af6c26. 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/HKI191405010.
6 Studies in English Folksong (version for clarinet and piano): No. 3. Larghetto (Van Dieman's Land)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeacf8e801f674aafc0510d852adb18dddc6878a52b3e11e7e17b0324860c418. 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/HKI191405011.
6 Studies in English Folksong (version for clarinet and piano): No. 4. Lento (She Borrowed Some of her Mother's Gold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa085446709a9bb47fe806d0a3839fec6c0b3e8132313825ca251984cb17d2a. 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/HKI191405012.
6 Studies in English Folksong (version for clarinet and piano): No. 5. Andante tranquillo (The Lady and the Dragon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d49a1173521cb9e3c6c35bc221776785de242f7cad2de4b64b8f4cff77494b. 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/HKI191405013.
6 Studies in English Folksong (version for clarinet and piano): No. 6. Allegro vivace (As I Walked over London Bridge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ddca84747bf7915e6863802605ca910b63be0b5788ce92f5125c6ab2ab2a0. 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/HKI191405014.
Rebecca Clarke: Midsummer Moon; Rhapsody for Cello & Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67be1eb8e5bbff9ed2d978dff6b16c845823620b8f32d28d85fc082998f8ee28. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBCTP0071501.
Benjamin Britten and Frank Bridge: Works for Violin & Piano
Guirne Creith, Richard Arnell & Thomas Pitfield - Violin Concertos
Discover The Classics - Heaven And Earth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56829faa20942a4178c3bbf263883d2978be4f868b87016e9ba539c05a9a4833. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLGL0809912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd5c0b553a4819f6a35c8012949f1c1d9d2cd19832683c94decec66151fb9a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLGL0809915.
Olga Thomas: Jubilation Christmas Special
Royal Classics - Franz Ferdinand - Archduke Of Austria
Royal Platinum Jubilee Celebration with Olga Thomas