Trabant () is a series of small cars produced from 1957 until 1991 by former East German car manufacturer VEB Sachsenring Automobilwerke Zwickau. Four models were made: the Trabant 500, Trabant 600, T
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 0x6b1eb3e660113365eeb484ba521b6d2a213fea412bf37b8d9a4b659e9c4c910e. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa06083a-1de8-42a2-b2c0-30d4182d499c.json and https://artists.proofprofile.net/proofs/artist/aa06083a-1de8-42a2-b2c0-30d4182d499c.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 0x730722c231660ad7ea69a3926aa9bb8a4367f6aae4e45ca07cd51aba7ff7db15. 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/GX53U2365872.
Itt Van, Pedig Senki Se Hívta - He's Here, But
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8654f914ba2ab26a9c46bbf30605a769209ed40a7f9a9d930bd9939c900ab298. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/GX53U2365873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefffb64461c5820956c7c995dd489dbf5d6dab6e39654b36bdbebe1533250d5a. 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/GX53U2365874.
Ragaszthatatlan Szív - Irreparable Heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaac7eb9f55f02948fae161e7d6a5d006a853c52e818653576ec4e96fc472b37. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GX53U2365875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719215384e5795b1d8d80283c8a67d27685de1dd9218b4213ec11160f895ea0b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX53U2365876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ccbde3f8a28dc76d27bcd6cabbe6f3b47cb31dfc57f32f696a02a7941bc96b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GX53U2365879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ad213e2fd57d1e7d32a451810892be54faf557e5c1fb58e1ee96bcdf3725d5. 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/GXHG92550326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9152360cdd46aae37e44992753a060d305737152f407c0b526dcfc1cb13c924f. 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/GXHG92550330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85c8eff5309c7233c7a62db1a6c563d1dfcd15abba05d1cbceb4e07c10eabec. 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/GXHG92550323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9463cb0c5816308813d2e6a02c16c26f6ae251ee65f08273b2b4931f3a5ce5f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GXHG92550324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cec20d2dfc81084d145fbc9caa5e4c04fbb13d166ab5489e4b7a41dea539bb. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GXHG92550322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceef523e7cf02ae7ef764768b99f51d6d146a57022dffb21dab6ba614c83fc5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHG92550329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b49642a069a0fd001eae2a6f44b89d913a2d3a386c42b6241bebd2568d559e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GXHG92550325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ec8db6fdeaf2d6cf52794468dcd3157808619cb75d2a20bd1e15cfbeaa4c8d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GXHG92550328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cf30aae4c60f90560eb2558969f026481f0c1dab0059ef7d2ca33cbafc2738. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXHG92550327.