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 0x0b4e7473c6abe648f1aa85f28e1fc744ecc8830e872e4ba2d476fa86105e1d6a. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98f89222-eb24-46da-8fff-6420577cf6cd.json and https://artists.proofprofile.net/proofs/artist/98f89222-eb24-46da-8fff-6420577cf6cd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Piano Exam Pieces 2015 & 2016, ABRSM Grade 6
Over the Rainbow, Extract - Arr. for Piano
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 0x386629259fb0e5227bdb14a9117284d3b6e20922a82a4f160c898a64161de13e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBEYQ1470513 — a six-check JSON result.
Piano Exam Pieces 2015 & 2016, ABRSM Grade 5
C:15 Love Theme (from Lyric Moments, Book 2)
Piano Exam Pieces 2025 & 2026, ABRSM Grade 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246d782ed9114183787bf52bb6fbea6e9fcbc85ca89cb9769aafa9b437bfe3f4. 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/GBEYQ2455247 — a six-check JSON result.
A:7 Andante (from Pièces de clavecin, Op. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45db7e6ac3783ed2d880defdc76693b7027d9cfd1f97f10989d6f8ff94a5bf3. 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/GBEYQ2455207 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e2206af1fa4f541ab31120a4b0cf1b2f116a5b6df0339774f0cd3168cdad08. 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/GBEYQ2455244 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20d5370c0c64828ad7e99fb2990992da1dd0248d27971cb9310e10dc33b041c. 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/GBEYQ2455220 — a six-check JSON result.
An English Requiem: I. Blessed are they that mourn - Version with Piano Duo Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672175bf0d3cb33623d3cec8fbe1613723a3dd1d1caa8941b4a1c9c4eb63da68. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBEBL1719501 — a six-check JSON result.
B:11 Mélodie (No. 5 from 10 Pièces de genre, Op. 10)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be46e7c351dc55fdffe31bfd3b4dbdcf49b710e38b36d9dff05d5fdcb71564. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEYQ2455227 — a six-check JSON result.
An English Requiem: II. Behold, all flesh is as the grass - Version with Piano Duo Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7915687eb78e650aaa3cdc5b43b1ffdae0ae9f390f9746cfb08656ca8e8c5a31. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBEBL1719502 — a six-check JSON result.
An English Requiem: IV. How lovely is Thy dwelling place - Version with Piano Duo Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9845f69188fee90f6582b9e97ae7978e996bc1a5208c62d8fcebe319b3ddb56a. 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/GBEBL1719504 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe6d963b3af92945ec31db329a32337c1870f4229688d4dc7390b7ec1f3a39. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEYQ2455243 — a six-check JSON result.
An English Requiem: III. Lord, make me to know the measure of my days - Version with Piano Duo Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803ee705f47451f65627a19a3a475553ac81aeaf47e46688b172ecf32971ed70. 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/GBEBL1719503 — a six-check JSON result.
An English Requiem: V. Ye now are sorrowful - Version with Piano Duo Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184c03fb42e7949005590a0af62615d22af7a778ac23ecd163f378714eebc7fd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1719505 — a six-check JSON result.
An English Requiem: VI. Here on earth have we no continuing place - Version with Piano Duo Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf508c551c679e40443137019b2255eabd54ee6ba8ffdd398b4b5e97b02fbc992. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1719506 — a six-check JSON result.
Piano Exam Pieces 2025 & 2026, ABRSM Grade 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaced890454cccc0dcdb9d977c53187bccb84b64ab06e2c6bf52c6123cef9949f. 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/GBEYQ2457614 — a six-check JSON result.
B:4 Prelude No. 9 (from 12 or 13 Preludes for Piano Solo, Set One)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0da69ac12eb1a52ce50830b8388585650e9647103c51bddfb170901afc3e07. 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/GBEYQ2457620 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318ff644e0020df22884586319d6bdf80514bdde6fcb111c16fd910e2f6dddd9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEYQ2457627 — a six-check JSON result.
A:12 Allegro (2nd movt from Sonata No. 6 in A)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb78252818cfbe390be31190ed0032eda490a18dd129bf7e28a0ed4512f6799. 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/GBEYQ2457612 — a six-check JSON result.
C:4 Bagpipers: Allegretto (1st movt from Sonatina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96b36f93b3f80613267da276c52460f1d3de0b8be9e73c56ffd49036e42d347. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBEYQ2457636 — a six-check JSON result.
An English Requiem: VII. Blessed are the dead which die in the Lord - Version with Piano Duo Accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e908ab9d37b97e83969f4c07264fa356d02f04d1d776e79c46708f4aa083390. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBEBL1719507 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f1fc572f82338ef025fc824f9effa7e544997dad7f45006db9dad38666751e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBEYQ2457637 — a six-check JSON result.