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 0x2d8fb7b2d118c539911efedb9a53961d2f627e07931e8185bee8b8cc48e07247. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24b1adb9-e5b9-49e3-9058-c466e4bcd26d.json and https://artists.proofprofile.net/proofs/artist/24b1adb9-e5b9-49e3-9058-c466e4bcd26d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Strauss: Don Quixote, Op. 35 - Lalo: Cello Concerto - Saint-Saëns: Cello Concerto No. 1, Op. 33
Strauss, R: Don Quixote, Op. 35: Theme. The Knight of the Mournful Countenance - Sancho Panza
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 0xabb3149b8c476509d12e75496c7280b460b8b66c1993ecb4a7784688bf23dc12. 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/GBAYC2200218 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation I. The Adventure with the Windmills
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cd54c9ac85f4a07a846c2b8976f7bc8d88192e65573f9c7c4b29fecbf3695a. 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/GBAYC2200219 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation V. The Knight’s Vigil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79275cc21fc8b1bb3adf0d9ee0ebd5e490f75183a3bfa3de80e335cc7077a0b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2200223 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Finale. Don Quixote’s Death
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf04d16eed571d28ccd059940e1264d05493a12ebc72b7f4654d487fe44d765. 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/GBAYC2200229 — a six-check JSON result.
Lalo: Cello Concerto in D Minor: I. Prélude. Lento - Allegro maestoso (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b373302f4a919891e6f9d511696a0be8694c205ed7debaa2ba262913112a90. 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/GBPFW2200048 — a six-check JSON result.
Saint-Saëns: Cello Concerto No. 1 in A Minor, Op. 33: I. Allegro non troppo (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195cffb1e3c6110d6fd6d216eec793f47459607a5fc83354a9d64467d5cff104. 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/DEA802200001 — a six-check JSON result.
Saint-Saëns: Cello Concerto No. 1 in A Minor, Op. 33: II. Allegretto con moto (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57f09efa056c6f411a2bf6b21f4289ac884d99b5d6d1e075ec15a9fb9e2cbd9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA802200002 — a six-check JSON result.
Louis Kentner plays Brahms, Bartok, Walton, Balakirew, Dvorak et al
Messiah, HWV 56 / Pt. 1: 1. Accompagnato: Comfort ye, My people
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99f056e78aecfb25fbeaf64ed9aaa2f6d000a6ebf4da36212b33a244cc24f32. 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/GBF076141702 — a six-check JSON result.
Handel: Messiah (Adrian Boult – The Decca Legacy II, Vol. 2)
Messiah, HWV 56 / Pt. 1: 13. Pifa (Pastoral Symphony)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbebd8f21f9fdeaa415fa24e0d733369050751024b02521a3ce6733ba9dc60. 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/GBF076141712 — a six-check JSON result.
Messiah, HWV 56 / Pt. 2: 36. Air: How beautiful are the feet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159837b7a7b675fce9210f40d90f61cac1c8a01729bfb978b9953c2982d783e3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076141731 — a six-check JSON result.
Celebrating 50 Years Devoted to British Music, Set 2: Gordon Jacob to William Wordsworth
Vaughan Williams: The Pilgrim's Progress
The Malcolm Arnold Edition, Vol.3 - Orchestral, Brass & Piano Music
The Stars Were Shining, Vol. 2 (1936-1953)
Vaughan Williams: The Lark Ascending (Excerpt)
The Most Peaceful Classical Album in the World...Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ac9aa5c1549c33e9e1db2a4997ce4e91934fa03267aef1121274b80339476. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC8700828 — a six-check JSON result.
The Lark Ascending (Opening) - 1987 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ac9aa5c1549c33e9e1db2a4997ce4e91934fa03267aef1121274b80339476. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBAYC8700828 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33fd2bb5890753b0680ec95330354ebc6eb488b5680be9d663e45945932241a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8701434 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d98a8743fc997624a17ae6d5c9a191e2dfbb6b432c118d437b9c1ca5b6c1e6b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8700941 — a six-check JSON result.
Holst: The Planets, Op. 32: II. Venus, the Bringer of Peace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61d1be9ccc7723b06e4daa7aa8f1b3b9196af22805d6512b44472f3e127090c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBAYD8700032 — a six-check JSON result.
Vaughan Williams: Fantasia on a Theme by Thomas Tallis (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df602e6e2a99b621148de8b5ba511ca2a0ce9463a8a7a33cfd02eb3804c4af6. 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/GBAYD8500285 — a six-check JSON result.
Elgar: 2 Chansons, Op. 15: No. 2, Chanson de matin (Orchestral Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d9ce330044fe55441368e6cfc5094e9f63ccbf7fffbfab1235613bd228d967. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8501048 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea29a6876047b8710635e62581441d9516467197445782c29a95e95d534b1f3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF055909620 — a six-check JSON result.
The Great Cello Concertos: Dvořák, Schumann, Saint-Saëns, Elgar, Haydn...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb3149b8c476509d12e75496c7280b460b8b66c1993ecb4a7784688bf23dc12. 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/GBAYC2200218 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation II. The Battle with the Sheep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20efb14f887d856dc2e0be2f66173bcd10f3f5a7153351ebce251f5578d0e86b. 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/GBAYC2200220 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation III. Discourse Between Knight and Squire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044b1e1de599a1761a3289939cf5eb676d431578d87a7620af9f55350b93cd49. 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/GBAYC2200221 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation IV. The Adventure with the Pilgrims
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089ccfa303d8268912a0e3fb86adc8c4f126cc3716dcbf41f798c293dda389c. 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/GBAYC2200222 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79275cc21fc8b1bb3adf0d9ee0ebd5e490f75183a3bfa3de80e335cc7077a0b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2200223 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation VI. The Meeting with Dulcinea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c820a087be145d74f8f89d6f334a9b418e47dca22e34c4183faa3a7c44c2dbc. 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/GBAYC2200224 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation VII. The Ride Through the Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705b269154b2d53a474731010fa6766d7ed1e1cba396a0f3e060e0f32fb92f00. 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/GBAYC2200225 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation VIII. The Voyage in the Enchanted Boat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1eb3753dcb94865b9f01d72cd9ab3bb25e0f004ace4a0c70e793e698f08013. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2200226 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation IX. The Combat with the Two Magicians
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3083557fc3da03fa17a45e85c8c0b5ac9041a203078bc7ad93dfe9d0a138a495. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2200227 — a six-check JSON result.
Strauss, R: Don Quixote, Op. 35: Variation X. The Defeat of Don Quixote
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0d320bed282c8300db183475a0f5a9d21f91cf65eb6dafcfccd1a25afe6ee3. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBAYC2200228 — a six-check JSON result.