Howard McGillin (born November 5, 1953, in Los Angeles, California) is an American actor and music vocalist. He is known for originating the role of John Jasper in The Mystery of Edwin Drood (1985) 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 0xe819772aca0d7af831d698e745701560018e09754d8ab7de74aa7931dad7fa0c. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91412812-e1ca-48e5-83fd-39ff5907747d.json and https://artists.proofprofile.net/proofs/artist/91412812-e1ca-48e5-83fd-39ff5907747d.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 0xff3e3a6bf96da4cfa485506b10805a9a5ad5b3e4bfd232b63a76a213eed04028. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA62485920.
Concerto for Stan Getz: II. Elegy. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd068cad7efcb1186f7199f62708d2b3995bb72c3a97195ee9835fb74faa39ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLWD1803002.
The Music of Upstairs and Downstairs: Upstairs Downstairs Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6598139fa2f2ceb56115517f3d44e3134a5321fa2400eaae2a63d00c59203783. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBUXE1201801.
The Music of Upstairs and Downstairs: My Perfect Sister
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e6a74777e8018a1732912313b351ba7a54fd104967029b2e412782eb181ad3. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBUXE1201802.
The Music of Upstairs and Downstairs: 165 Eaton Place
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e457cd41ed3faad0d35d4d9321127b2e6fbca3d5015133cdef45d8d8ea3f7. 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/GBUXE1201803.