Defunkt is an American musical group founded by the trombonist and singer Joseph Bowie in 1978 in New York City. Their music touches on elements of punk rock, funk, and jazz. Career Joseph Bowie is
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242e3362859a40c5717e11de5f1bebe65531b3da4c6dc3a392e6655850d3c198. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36a47134-6dce-495e-9320-f550eb20b5ab.json and https://artists.proofprofile.net/proofs/artist/36a47134-6dce-495e-9320-f550eb20b5ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classic Defunkt (Live At Jazz Open '96 in Stuttgart, Germany)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d09b449d1289103d606d6c7be9784103067314a9efa989444abc6257487444. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USRY20515567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caa86c539705a4f1b7ada849499f54204c38c61491dd036157e4d36e622a726. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USRY20515569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f942f3dc68bb6dc3820ec6908d0defe9c8060f0dfd01d1ce7c725941867beaf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USRY20515571.
Joseph Bowie's Defunkt Soul (Double Compilation)
Defunkt Journey (Live At Porgy & Bess/vienna Austria & Effenaar, Eindehoven Nl)
Defunkt Millenium (Live @ the Paard - Den Haag)
The Legend of Defunkt (Volume 1 1978-2001)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6dc581308090bbfda485225f7c9706b9d50c3655e5a711aefb3b413ccddcba. 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/USRY20515584.