Sophie Sweetland, known professionally as D. Tiffany, is a Canadian DJ and electronic musician. Originally from Vancouver, British Columbia, Sweetland is known for her electronic music and for foundin
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 0x4b764087b42b9bf3967005ed43952481d91735dd8a6bf88e352711886eada5be. 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/a737d60c-8ab9-40ef-ab35-e4b101fdfee1.json and https://artists.proofprofile.net/proofs/artist/a737d60c-8ab9-40ef-ab35-e4b101fdfee1.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 0xb2f8cbd8372faf979145bfa1df72440e6705d14d320f8ec6b597405e33a42e48. 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/NL4UC2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce211802a52f7cea89213a1432a4a43755f85c8e5678fe0bc8434017d8b57bcd. 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/NL4UC2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe900a5d860c9a83d889af17c019f681a76d3ef4d402a9c9e1cc4c4e9236a4d. 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/NL4UC2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc828a51f2975b310504841d2c5e278d80e14eac6bf606ce453618dfd24707fa7. 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/NL4UC2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e1c5e3fc94779ba56b874a2cbfac1198ee873c71f59ed9be8db97e840db6e. 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/NL4UC2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d74845e92053b8ef596c4d1d2d4a885bbb81c360e84d291927359aff5e114e. 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/NL4UC2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb59394ed6dad3440fe8b263fa2d8f0a4f1f1368be101f6bc987d2bc00af046. 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/NL4UC2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5dc7f9c90efb315e455b823569098a7d0ca82cc31146649c72f490da98280a. 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/NLZ8C2300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42802ec56b6f9dad6716171a4291a2076fa2a1a4d79d4656ce900d32960077b6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLZ8C2300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3db86c48b58188f3ad7ed7843161090d50cfdf25910a3bb7842679704c423e. 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/NLZ8C2300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ca2d0ab78acdbfedb40764d5d4bb66a2174758ad8f9f6b4c05c5661e453fdb. 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/NL4TN2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6514ba3df22437cc62134791421f7c3aac25caf009368440b8bd9251048df490. 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/NL4TN2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cfa609e4a11fd99e90c781cca4acf648a102ca29aa73b870f787bd329ecb70. 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/NL4TN2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2516b88707981ff410b3b88addd469d9619f8bf5c562492d97e2189a23cefa2b. 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/NL4TN2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2450d22a482a407578240e774ad3f2fb9fd6c103209ce3da5672c7a1c335b10. 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/QZ5FN1927140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e08bbcb2d44089c5bd51c8b8456df13470f34b96ee86511cc5786daa8f012aa. 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/UKL4N1700244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dada5f2000208c0da7a4b67baaf9ec23ae24311ca8e2e2e9f45d654c2e76e72. 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/USLZJ1957600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d12695c318bafef5307e29dc2262660177ff56ff4cfc7d89ffe618cfa47dd0a. 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/USLZJ1957614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fb81442f61666306d700fd7ee9b7450d7b7e8236997baf9fe81bda85fdd960. 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/USYBL1701166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7ada645d40b1ea9f324a43d4d1cb1693482b841ebec957ac96bb073f682821. 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/USYBL1701167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1a0497105c95b95f5ca23c5a71fa829cfd2490a4239f167d75b2d46b199960. 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/USYBL1701168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf777a0b3df7cb0f4f5f771893579b61cd3cfc8d79142a4b1653f6df460e40fcc. 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/USYBL1701169.