Michael Calfan (born 12 November 1990) is a French DJ and house music producer. Biography Calfan was born in 1990 in Paris, France to François Valéry and Nicole Calfan. In 2008, he was discovered by
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 0x4c85e33eb0a790aae68fa85ea0719c3806776f889053d409bc700261d2f28b15. 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/b11a1bc9-01fa-4fa0-941f-03cf14945be3.json and https://artists.proofprofile.net/proofs/artist/b11a1bc9-01fa-4fa0-941f-03cf14945be3.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 0x3c0b411208349624ef5f9f6403b130d5f1380c8f2e14ec2aa239167fc92f1880. 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/GBAHT1800322.
It's Wrong (feat. Danny Dearden) [The Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbc4f2458a87a8c054cbfd76109e2237a4c065ef156f6be4722bd15c94d0283. 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/UKRBV1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4979cb2c9a66c21276342625b84089d920003205121bb6b074c7b138c41a810. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAHT2000353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2348941c2db3c3197095e65cb8b4eb7e398efe046a27354d9fcf6c6b0f4784de. 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/GBAHT2000354.
Resurrection - Axwell's Recut Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcf0524d9bfe12b23cd0296caa0c41521ddbe4bb153273e24ffafe6b9084410. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKCF1110197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44e584782fb3f3562fe53154873cf9d302d55655f9a81431568e77e9e4e7004. 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/US3DF2141720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27952660a4ca9ed74effcd64d85d409769550134a86561d9818aab51d8a934e. 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/NLZ541500826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cdd260955d5357ca0f03213aedd9574f18ed50bc76762edb18180fa52186dd. 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/GBAHT1800193.
Hard Times (with Robinson) - Michael Calfan Remix
Hard Times (with Robinson) [Michael Calfan Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb194373a81edbd0fa2b0ba9c2209ecade6fe4e51c25c76f64d7eabed6b18a. 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/GBUM71904313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b2f59dc521e1d6ea8d226f50029c4d9b0ba40f6103af99529ba12f455bba27. 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/GBAHS1800733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1885955cb4547b6b051aeea73989d3828a2e717c3472672fdaa6719d42e1205. 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/GBARL1900502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cccde267061e5c73b0d5d74fb592217615be29ab47994c191f22b29327e8a2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT22106173.
Courage to Change - Michael Calfan Remix
Courage to Change (Michael Calfan Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1de17c73767463eb676a6ab2037c029ced0722ef3f2082c4f1e562bfb96b51. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT22206341.
Finest Hour (feat. Abir) - Michael Calfan Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614bd158ccf2d01ffa1474a7351adbeb56da6ded7a166abbedd31b652bb3ce53. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT21802759.