David Zowie Canada Batt (born 30 April 1981),DZ on Twitter: "@assafmiah Thanks! I'm a year younger today!" Twitter known professionally as David Zowie, is an English DJ and record producer. He is best
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 0x0a50e70374ddc31ee416b2b4eee4bdc200d5e18aaa9c8ab43bee1d84cb3ce7e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8934c6a6-76f7-42ba-a452-4f25b6447630.json and https://artists.proofprofile.net/proofs/artist/8934c6a6-76f7-42ba-a452-4f25b6447630.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d519532752169f9083a5cc789e062eff2d2dd9758dbb74014c11a1025a1826. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE2050453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554e03e1adad458521a7e0a13c055710567bf408e0a726014562bb328d8a7523. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM71502958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfa6d433fb85d6cc65fdfce7bca4657e16b776ec8eb51b898b1171676ec39a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM71606221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a464b93caeb715d07bac5c36b91a547921d596ec83c3f6ea30484239a96987. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBCEN1500424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d519532752169f9083a5cc789e062eff2d2dd9758dbb74014c11a1025a1826. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8KE2050453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7e2c61ddcd0e8c6dc95309e0bb6ebe5bf5312aa36b0ff58e5f316ada0ee98a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2050454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a3c3fde607ca1a5f5ee8c5401c77593d23a9eb67524dc084a759daed6faf99. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBUM71505686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fce359d5be25c92c761731399cc7f85d091770d631a61b1dada6ce8b493896e. 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/GBUM71504044.
House Every Weekend - Mandal & Forbes Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c58ef760c46f4c1eea02fb73a14f923ddd86d219c77bfbe9fe1b6eb6f3afc. 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/GBUM71505685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb826e3bbbaa472e27f38069c3f61d52b9ee2e035f66dd6410c22d80d3a5c5b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM71505683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb826e3bbbaa472e27f38069c3f61d52b9ee2e035f66dd6410c22d80d3a5c5b6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM71505683.