Julian Fernando Casablancas (born August 23, 1978) is an American musician. He is the lead vocalist and primary songwriter of the rock band the Strokes, with which he has released six studio albums si
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 0x743cb51d13915f002bc390b20d860075be14092b1440b7272f0f1013367a93f0. 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/d5c124a5-0656-4aba-8f11-8c86817d9e74.json and https://artists.proofprofile.net/proofs/artist/d5c124a5-0656-4aba-8f11-8c86817d9e74.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 0x50ab1a057f8d3070d843c356670448ef44ba66bd6902a23d373fdae2e93c6108. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USRC10900511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57345ad33b2a0e905ef20dd9f10b437da91ad598799b0dcc95f1876577eedaa7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USRC10900513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b54d7fe7ead3178f7e88d0f5d4fb342f79787f72750d750cb8811b210b44475. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USRC10900510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949485ca58966a9223669e817a16b8afd6cc15783817606869e0d5e423e07644. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USRC10900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967074b9d63df4286d5271133732e6cd54287b37b98bfabed6ebd676e6fde40a. 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/USRC10900516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2235d711a9ae81a3183e87614a18542b16509a8bbb0dd6669b00f1e91d33befe. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/USRC10900593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2b302df2184a968a6240d4298924d2cc45219b07235ba343d46cfdc1690269. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/USRV81000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d20e20111e9087242b677389472d4d499e7f0f34bc1ae4381eb65b41f9eee. 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/USRC10900509.
Live From Electric Lady Studios/WRXP New York
Ludlow St. - Live From Electric Lady Studios for WRXP, New York
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa103d20f0feab93af4f84b2c477422a8d9cf8ea9f603077c454e94d5627674. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USRC11000233.
Out of the Blue - Live From Electric Lady Studios for WRXP, New York
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc512adcd800c2d61f244c52fcde2d7b1d2a527da270b72fc86dec4989f1ee67e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USRC11000234.
Instant Crush (feat. Julian Casablancas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05afbce7a6da2936464515c5446db0326d75724d13b0e5b8125fb4ba8ac4a63c. 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/USQX91300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a32f6628cc5c8b90cbbbf26bd47ca72888cc2bb08c85192f7e81d51eef68cb. 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/GBAYE1000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4b95c53e5695b3a74dd3909f2d95e23f7953782b99296bebf10975473ca785. 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/UKUZW2001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00398d5f7501631a6cd4830aa87f09d92cb1e95dbed7d485d3d5a82a4cd976cc. 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/USC4R1100012.
Brat and it’s completely different but also still brat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7c8c03e932086f3449355416758868134c08086137f8a30460b6467b08e861. 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/USAT22408100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7c8c03e932086f3449355416758868134c08086137f8a30460b6467b08e861. 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/USAT22408100.