4Lyn was a nu metal band from Hamburg, Germany. 4Lyn began their career as Headtrip in 1995 as high schoolers. They recorded demos and played locally, and in 2000 a gig at the Ohrenschmaus Festival in
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 0xa31f927fe8a86f6643fa691feee370362c4995e82dbfd204dd07b621aaead1f1. 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/c646532e-5ced-4756-aef7-35a5b632bc89.json and https://artists.proofprofile.net/proofs/artist/c646532e-5ced-4756-aef7-35a5b632bc89.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 0x65d70a3a5bd174b96c8c8ebe5c8f8b62761ab3a964da5883558cddfbf57a2783. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEN120101225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6d329f366e9514fff250c2917036d8bf2ed1b9781da2dfa9906dbc3994ad1a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEN120100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ba8b17ea69eee6f330b76e17f52d4f48e04e6fce4036a1427b903e656c9fec. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEN120100841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2244196b6f8fb13897fb6c1d1d3b86552855950675ec95f78b6ba66ce760ec. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DEN120101228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e25b64c1412034fc7163569ed6bdf6370bf3dc830d0a7f6f86114ac878d550c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEN120205732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b19521e81cd1187e90296b0f1db18c6ccc5050886f19e89dc63bcbd31c26cd. 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/DEN120205835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c04ac2094c61b3fef82471f27386267ccf32c464e2d1140cf6b74be17ea2445. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEN120205843.
Take It as a Compliment (Limited Tour Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e01aa92b92ded7ff6840abf0f08cf14f2cc12366595bed983583f8038c1821. 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/DEH840400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd09bc6d752056d716ee910588938987a0db10ec17a3fa6225b939550d028c8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEH840400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bd60360cd957317045201e86cc927cb19ca9e13afd82aeac2e7031e7da1948. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEH840400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41810f830d393274d2f3cd117be85bd9722ff4bb2e14399dad488151910d200. 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/DEH840400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7dcca2cc78e8be17d355e3377c32ca962a9c5d56ba4b1aac41892000a89fac. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEH840501168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe478a435e8093286adaa5047635c168fc1b85e12ae0d10c686978096088aca1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEH840501169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92935c62636a16a3d1cffef007011f7928f5337ba2593d2b721c195b94cd57ba. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DECQ30700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1938ed2c41e3a11f03cdfa9782180a729b677bd57ab139ca6008a4c419acf0. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DECQ30700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ccb67f34791ffd1b7a8e921807f087440df26ddf7114c255add32d3c5bc5df. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DECQ30700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e335ade73c378ba9209a8bf9621b7b3867a8a3ee6140578624646508f98848. 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/DEPT21200029.