Manning Sherwin (January 4, 1902 – July 26, 1974) was an American composer. Born in Philadelphia, Sherwin attended Columbia University before embarking upon a long career in musical theatre and films
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 0x488233d3090f2f0f36d5348e7c62a4d19e568e8c4a781b3f04471adb69af3afd. 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/5e88dc8c-c9dd-4db5-aede-39e13c21a5ad.json and https://artists.proofprofile.net/proofs/artist/5e88dc8c-c9dd-4db5-aede-39e13c21a5ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piers Lane Goes to Town: Encores & Party-Pieces 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 0x4085c80738b53a177bd8c44039d8a34850b5f913bcb75bf65bdda9be2923be11. 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/GBAJY1396706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf242d3e8c55c0cf57e05c160f46557acff8f84b38eac91bf26f45d198405c760. 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/GBAJY1396709.
A Nightingale Sang in Berkeley Square (Arr. Ruairi Bowen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66fc68c78bf6f17bd6cefcdb55350121fd28c5152c49199de3f91abba3c24a5. 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/GBMY51400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b45edce7a924f661fe61ade8794835555745a3661e4e94c792fb757330c364. 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/GBAYC7900209.
Menuhin & Grappelli Play Jealousy & Other Great Standards
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b45edce7a924f661fe61ade8794835555745a3661e4e94c792fb757330c364. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBAYC7900209.
The Golden Age of Light Music: The 1940s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2fdaf485d888049b76bfc3c8b1267c9b0091e5000a65304d0262c22bc0a3d. 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/CH6630450211.
C:3 A Nightingale Sang in Berkeley Square
Piano Exam Pieces 2025 & 2026, ABRSM Grade 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0ae5c8951a9f67e4065cebe9397de8a7950293575017fbaa70a68835daf07. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEYQ2458335.
A Nightingale Sang in Berkeley Square (Arr. T. Poster for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21d55c15c3384e6d8401b727bd8384f01a54a63c5d04de37358eff0352fba0. 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/GBYDS2100254.
A Nightingale Sang in Berkeley Square (Arr. for Vocal Ensemble by Gene Puerling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b093897b5198e51007c465ce7c51215ae6057aefd10ba5d4e68169b04dc7d. 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/DE1JB2442710.
B:3 A Nightingale Sang in Berkeley Square
Violin Exam Pieces from 2024, ABRSM Grade 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbdf96a72a4ea71f0ef855b9f482789847d603eae5b8e46e01570925f666677. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBEYQ2392706.
B:3 A Nightingale Sang in Berkeley Square - accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b8a6a87eb4371ad9402f93ac60d305730a1e2ce3892808c7612b0bd64f3f66. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEYQ2392714.