thumb|Bob Chilcott, Shruthi Rajasekar and Reena Esmail Reena Esmail (born 11 February 1983) is an Indian-American music composer of Indian and Western classical music. Esmail has been commissioned 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 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 0x8266bc21116b177537cd894589cbb00bee8c9dcfc772ef552987f43305adef81. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ffa927e-ab7a-4367-9284-65dc99df4e07.json and https://artists.proofprofile.net/proofs/artist/5ffa927e-ab7a-4367-9284-65dc99df4e07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7b527aeec9a2bc77d8e2d7bbfc40784f05ed61934603bf150a89f7b0fea560da. 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/GBN3Q2101895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c33829fcb6c7a1a61877cb2f901f26fadc86c3c063472f9f180c262f4e4512. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBN3Q2202952.
We Look For You (from 'A Winter Breviary') - SATB
Choral Music from Oxford with The Gesualdo Six 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7595baa8786c8c49b98dbf4dba3a22d3f7d7b17bef9d582619963e42f75b155c. 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/GBN3Q2202814.
The Year's Midnight (from 'A Winter Breviary') - SATB
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26524407f871770c439d99ff6b3cd779ef11967af83b6633242e0b8a4676882d. 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/GBN3Q2202815.
The Unexpected Early Hour (from 'A Winter Breviary') - SATB
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526666e79a67a3a4cddb62edb2e470d280e753e49df3abf2b468a44abf0c56a2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBN3Q2202816.
Violin Exam Pieces from 2024, ABRSM Grade 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3304d9ceeb88bf845ab7639d042d21feb017157b643096348448f1a2993b9daf. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBEYQ2395808.