David Baldwin may refer to: David Baldwin ( 1830s–1870s), American inventor; owner of David Baldwin House, Midland Park, New Jersey David Dwight Baldwin (1831–1912), Hawaiian businessman, educator, an
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 0x0a0933d400fb5ec4684575b5071dfdfeb25f9668b0102d84b669e8d653fa5278. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab885d8a-62b9-47ef-b43b-5eb90bf32ced.json and https://artists.proofprofile.net/proofs/artist/ab885d8a-62b9-47ef-b43b-5eb90bf32ced.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mind over Music: A Guide to Music Licensing
Suite No. 3 in D Major, BWV 1068: II. Air
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 0x9f8ee1e57a3b0bb366518cc4a0e5fc1df9a66b7b00e929eea9309ea4db712df6. 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/SEWDL0715602.
Psalmen Davids sampt etlichen Moteten und Concerten, Op. 21, SWV 22-47: Herr, unser Herrscher, SWV 27, "Psalm 8" (arr. D. Baldwin)
A Brass Organ Christmas in Grace Cathedral
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebd87659c6e6308f43a78882b6ef5e57d2cdc3cfa781e67a1bb2f84ab26dca7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USG3E0012003.
Messiah, HWV 56, Part II: Hallelujah Chorus (arr, D. Baldwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11d4101fa1fbc673c497874ae57870dc77568615b25cbf5b9b34db53d4d4b65. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USG3E0012012.