Stefan Obermaier (born 8 January 1981) is an Austrian electronic musician, producer and DJ. Born in Salzburg, Stefan Obermaier lives and works in Vienna since 2001. He produces different house music s
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 0xef2e4cdf13a57a4eac36423469cb8927ba22d0f3c7811e13b568dd85eec2114b. 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/7d99c2f3-66df-4b37-a176-ce4267f4cef2.json and https://artists.proofprofile.net/proofs/artist/7d99c2f3-66df-4b37-a176-ce4267f4cef2.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 0xf70ee69d348e9923d1cb5a803ed674828dc3c2bbdaafabfbd6c9709cbc9c1cbe. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ATV250901913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc849f31fb8d082873fad07beb45f5e2262aa51222695d2425d2382e50fa2beb1. 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/ATUM71100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc619e1f67908cc291604499cb0c312cc365935fa0a7e3f5c436071f7d5f25. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ATUM71100441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112c602fca16dfad037b5227ca7282f35661c1cb44b5176b13482f3d18523f5a. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/ATUM71100444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10630cfc70c362efcac8eae95515b1c8b30a130512e27b19755f054a15ac98a9. 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/ATUM71100445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9939662afc22746a9b4defeab973d309dd745a8f47556eb043098b66a869de12. 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/DEH742156619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3925d6ec487cfe8993f83d5ed53f7003fb1a37b259bd0fbf9a7173d9a55c821e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEH742156621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d19ab42f3621a00663f99dd00da478c61aac0205e3df529ab222373e1da307. 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/ATUM72100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074e96dbc0f4225489c2f354ca1479adb41e87bc4508a75f4e215c0b5c8875ea. 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/ATUM72100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467315c1111261f3c88586d7c589712e7c3131f95de3e2e1498b7c947099746b. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:22:22Z), 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/ATUM72100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a3e9894abbe7f50b91688e8787c01456105aaa61e1852a221a7035b880785. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ATUM72100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d71187ca23bad6a036d7ece9cd7357c49387bc4e687a989bcdb9cd0cbe6be7. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ATUM72100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a32651575b1bc0df796b29d489c17649324471fb498d72db1f7bbcede585091. 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/ATUM72100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56d991dbba959d4c3c7a583deb8f0d0a712e76231088232484b87b70b81a176. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBKQU2255411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a99dff0c388d7154648f1d3032ad9daf49e2ca2972da9b2359964754a87f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBKQU2255412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28168932e0cc3c3ebfb63d6080719b6fa018940f7f8154fb41101bc52776b11. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/US83Z2462787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae7527b97e92454de5d8237ac50621bd6edc0fe8515a2b4d850069b4fd50c56. 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/DEH742422041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc696029d077795e9165baf11737029b59c0958d2500e930ef8e73d1e72f53c. 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/DEXO32485662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306dfbdf330feaa1ab1bc442118d2af2a1076bf081adcb7dd29b3bf509e2e87c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:20:16Z), 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/US83Z2552604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c3fe5cc5e9683d71d1554c18d6f68a71c3561212409e1d99191db50aa5a4a9. 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/GBKQU2408130.