David Bluefield is an American songwriter, composer, musician, producer, arranger, and video director. His song, "What's the Use," recorded by Mary MacGregor, was the "International Grand Prix Winner"
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 0x11f166947b8c7fbb6892a70a32040d86c8c566d2abd880364cec421cda59752e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c250edd-bdd0-4972-a15a-f49a49e7a42f.json and https://artists.proofprofile.net/proofs/artist/4c250edd-bdd0-4972-a15a-f49a49e7a42f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Suite 3 from “5 Suites de Pandemica”: By the Bed
Suite 5 from “5 Suites de Pandemica”: And Beyond
Suite 4 from “5 Suites de Pandemica”: In the Bath
Suite 1 from “5 Suites de Pandemica”: On the Couch
Suite 2 from “5 Suites de Pandemica”: From the Chair
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 0xe2deb0c59aa9f90a5a523e23bba66ed3866aac98f40feacec025bb34e7d693e3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX3HH2366422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc74a49af3340678582c9078e88143e12aad66ccb2149a9cdb9f50da3704fe. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/GX3HH2356581.
Hollywood Dodgers: Live Aspen CO 1978 Vol. II
ArRanger in the Brainforest: Bite-Sized Instrumentals
Clazzax Trilogy 3: Rolling Over the Classics
Didn’t Have the Heart to Leave Her but I Had the Mind to Go
Gimme Someone I Can Hold on to (Instrumental)
Didn't Have the Heart to Leave Her but I Had the Mind to Go (Instrumental)