Sunlightsquare is the pseudonym of British Italian music producer, pianist and digital entrepreneur Claudio Passavanti also known as Doctor Mix on YouTube. Primarily known for his work in Latin music
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 0x5bcc0d5e5ef48b88706f00ced43c0b8d1409c3c2e1bb8dc866b5a7b88060fc79. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7f9e2b7-9618-4844-8f28-f8966d5de20b.json and https://artists.proofprofile.net/proofs/artist/e7f9e2b7-9618-4844-8f28-f8966d5de20b.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 0xd7a9d09f41dd86e8610e03d9a8a2bfcd7b3fe826089f9dbe8384460fc7a04e58. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:59Z), 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/GBLMR0800005.
Breakin' Down (From the Film "Cuban Fury")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f0446dd792cb7bdc522a4f00a4d76eb3a06ccd6783153f391827658b0e255d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBLMR1404007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925ec805477f60f0acc28c22d6d89e174fc1bb6c974522118543c42ab9e36be7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLMR1404012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bde0653975625e3f13726c7a3c70aa3718bf84efabd91f9a97736a78489d2e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLMR1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081bf1e1e65310abafdef9d6d49e7c19257cd8f677a4fd056e6eb825f87d1f00. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBLMR1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43996a6aa84b6541999caa84dab01aab3b904f0cb133eb462dfe29d5fdb0335f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBLMR1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43996a6aa84b6541999caa84dab01aab3b904f0cb133eb462dfe29d5fdb0335f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLMR1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843d3f5c98a6dbe57b15b56fd345def37f53c452063972ba600d4a4e7aa1e282. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBEQT1900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3532879de732678fc708861bce6983f3fd0f5ab20833a339804f77fc5b1cccd8. 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/ITFGO2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0a4653201c820aeede2d4b1f906cdbd3c2def14d785053c19f85b609ad6799. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:00Z), 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/GBKQU2108294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf209d9986c6d65e22d9b196cdbc993da29a69b0b005758f5f5319c0c727a321. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ITFGO2100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d043bdc15c21fb83b3b71e7f5e3ca69a67baff51884366bc2e73cfe6f0cb9a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITFGO2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0153a1d32d36f2d971983d79b367fa33b6a93ea557b66e9263a57077777c5fa. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T13:01:05Z), 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/USAH92500424.
Perdoname - Dave Lee's Latin Escapade Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2906c4af60834ec49700887198d7e41be910bfc89c1d25afabcdcac1899c1e. 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/GBPKF2000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a894f42f3f29c1db22afe4b8db0f2cbe00d6e38adaa71211cc06872674346c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBPKF2000133.