Duncan MacLennan, better known by his stage name DCUP (pronounced "D-cup"), is an Australian record producer, DJ, and remixer. He is best known for his collaboration with fellow Australian band Yoland
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 0x7e990998b38d4446fc0136553f41a9334b42642ee943f51072244ca2ecc762fe. 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/95ec1eb6-2c77-4b44-ab34-98e428977261.json and https://artists.proofprofile.net/proofs/artist/95ec1eb6-2c77-4b44-ab34-98e428977261.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 0x0523a1a7ced804ce61729d44a9c3435696d8df625c14bb64c5386bd5e787a026. 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/GBKPL1356423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44887294e4d8050bc651300fca50d1d63867cb27062176832cec3257e8d949e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/AUVC01232631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c57012e04a8468f35b0b14afd491648b7f56cd993d7119cf9b5bb7ae236e179. 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/AUCN30901654.
We No Speak Americano - 10th Anniversary Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4ed4b76619abe1dd249e93182bd62f33cebbfc2976ce2ee9c87d77556a6d18. 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/AUDCB1701674.
We No Speak Americano - Sllash & Doppe Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b981fd0ed87048280e9a69fe6a27f33ff00bfdc3634d6844fc434596525eee. 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/AUDCB1701675.
We No Speak Americano - Chemical Surf Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab388665aef2f865aa95db6a21944a41eabe394f2a7e9d273c61d914a26850b2. 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/AUDCB1701676.
We No Speak Americano - JAXX DA FISHWORKS Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6467d478ba4c3540f1fc0d9c47c56162c4c02096a9f931dafea041576f1f69. 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/AUDCB1701677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53212bafef3e4ddf134a1b665d5fa36df91af48ce7909be63c68a2bfb08346db. 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/AUCN30901316.
We No Speak Americano (Friday Night Posse Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa447912c99f4887fa7457603bf76cb132e931eee37a3728a1ece1f9579b65435. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUCN30901689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac554b2c36ef5fab4a4bb39d086819d24f73934527b8e19d34e0bbfa371b54f. 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/AUDCB1300475.
Sugar Man - Yolanda Be Cool & DCUP 10th Anniversary Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572bde77f4822459ca39745046e98088340b584c30cc8587e33ba78b6adf28e9. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/AUDCB1702958.
We No Speak Americano - Luca-Dante Spadafora & Niklas Dee Remix
We No Speak Americano (Luca-Dante Spadafora & Niklas Dee Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d25d6ca86bbf4c62e7903353dc649fe888100fd31bf42d66f541734fc2b1f66. 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/AUDCB1702479.