Christine Croshaw is a British pianist and a professor at Trinity Laban Conservatoire of Music and Dance, London, England. Career Croshaw studied initially with Harold Craxton through an award from t
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 0x3428940916366c3b47e0f7deb9261c1c9f54a5b5c9530dd1467668bd58b35acf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7ede12a-caa8-463d-9e86-ff0eb2d124f9.json and https://artists.proofprofile.net/proofs/artist/e7ede12a-caa8-463d-9e86-ff0eb2d124f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Camille Saint-Saëns: Music for Piano and Cello & Piano
3 Romances sans paroles, Op. 17: No. 3, Andante moderato in A-Flat Major
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 0x26be0bc7b8880e3c2391599d75406280c0b104ca1acaaf4f21149a579f14ad3f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBABV1563603.
8 Pièces brèves, Op. 84: No. 4, Adagietto in E Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2cc02f9d35f5f07e335832f3047f0ef81ca625d475a21ad9e9497810808269. 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/GBABV1563607.
8 Pièces brèves, Op. 84: No. 5, Improvisation in C-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c447f2f37a29758271d7a688eb2e4245ca9234ad769f241e3eb241decdeae7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBABV1563608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb4efebb780e4f15a0249ff4d5278670a87a2f6e600950e3e8d8105232c2a9. 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/GBABV1563609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9884d8041f14905a88d1e71586cd1e57a865453a5d2a4bde5818022f3bdd3f7d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBABV1563601.
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 0xc63982f34916cfc23ac85a4f5b8e71532422e5b5120998c55f87b8cef69d12bb. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/GBABV1563602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5ef46b314119bdf7b41fabb0dc149532f74e6237ed83f44cb7ff3d22e371ad. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBABV1563604.
Valse-Caprice No.2 in D-Flat Major, Op. 38
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa560f3dc62f08fb738cd3a15d4a7cc8fbb49f52a1de1fdd14f85d6ecac3d6cf4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBABV1563605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e01cb8d86eeb28c9d79dd7560868085765a0036b11c8fc387ac65ad0183565. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBABV1563606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07fa51e795e9c3853c33d765f2999851fd0bd86cbe366ba95c11ee718e0f013. 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/GBABV1563610.