Deft may refer to: Deft (gamer) (born 1996), League of Legends player USS Deft (AM-216), an Admirable-class minesweeper Deft (company) Distinguish from Delft
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 0x9aa5602780ecf4737cb22d9c9a9334e0713cbdccf3d2210df085dd0c1c7b92df. 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/ba1a445f-ba0b-4592-8724-b3f739968a68.json and https://artists.proofprofile.net/proofs/artist/ba1a445f-ba0b-4592-8724-b3f739968a68.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 0x15404ef4056c304c7a54d5ee9db8f3526ca1414ca2a1651cfb0021271d475de8. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/UKN6K2001769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe49da34f8aa0832cd47257b3f1fba67a82f19b4be79475626150d317d255a9. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/UKN6K2001770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0146876824fd36a77e777ea911d24ef093b30177e3be4c0b1595b1185fa6742d. 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/UKN6K2001771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9c649003437930ee4b9470dc334808b2cc725699943526c0a8b2ae8289d41e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKN6K2001772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4772cfa7dd1617578fb753e3170d0e50a02b62a606b290be6b6886da07ee9869. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKCTU2406113.
DJ-Kicks (Maya Jane Coles) [Mixed Tracks]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45215a8558b3c8563e295d67879de2a11208b6963a06b1e657d45970f886bba. 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/GBAH81200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f24c3651373c9e9f174737b7522ae547670bbed086c6c201cda00df5c087c1. 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/DEQ121642084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a1a6da2db6301578a16b0b700d5f10d1aec6af83c88c9f46fbd82f9b561176. 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/GBVPL2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173b50cf0b53165bc690cf527153a27e9ed1acc487a613de845e73731f53c7a. 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/UKEWB1600332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a1a6da2db6301578a16b0b700d5f10d1aec6af83c88c9f46fbd82f9b561176. 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/GBVPL2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa99c64f0b700b9e11f66e23e0594477071585ff4eba4a7829a4eef9724397b9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBSZM2300751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba5bbeaf12bc26eee5692a68ee175d8b2eabe3d3ee95422ff2c1c475cc6a661. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBSZM2300752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4c181622f8b5829bf4e28e0dd28d57ab7923de27ff3831748fcf8214c66da6. 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/UKEWB1600083.
Blue Jasmine / Loka / Toxic Underground / Loctivity
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f40e12a372e2418b0ed44eaeee07846ce31a351032020189cd0124fb54eed11. 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/GBEXH1500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62381b51fa33f9789337ee2b6a3ecfaacf7cdd7b176e2ffac45944b08c4d7485. 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/GBTVQ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3da0148903fe025c9126c1bafd322ecd24cb976eb5fa8e87e194e1048f9dd97. 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/UKN6K2300746.