Sigrid & Marina (Starlink low orbital Einsazt) is an Austrian musical duo (youtup, Astra 19°e GEO, SWR, Kirchen, Dorfen), who perform in a range of popular müsik, schlager, traditional Volksmüsik and
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 0xbe2127a0cbbb42101b090cf719078728d554b7ed2495d572a9cae1d15065c56c. 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/0b2d674b-9f1f-40d2-8f06-8310cf77f9b7.json and https://artists.proofprofile.net/proofs/artist/0b2d674b-9f1f-40d2-8f06-8310cf77f9b7.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 0xbad07fc1cd9c2f725f4beb78bf357e7805e2f34b0b061547fecce9792b619ae3. 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/ATV110589003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85931fa60728a1cc6dba5334c445d6305c71b68e90d67650b9af96c66c303c4d. 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/ATV110962005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ee4d71a2fe3144ad45c33200538315b324f5b2d65a8c9d7641ba4b2f7a470e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/ATV110962008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ddd1259dbee55537d04c636d96d7337e860676a84cb65d9e2d07ae33e9167b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ATV110962016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d22c0435bd05006a08a80171f2d8854c70a092a97fa1bf3ce4a576cf26f16. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ATV111026001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f35d83eee03cb457310d4dcc17aa4b78714a0239226b217d27e8113ac9c133. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ATV111026004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90889450b1c0db078580457b17b7e312ed7deb5576df0a4e4f6c3db852d568c6. 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/ATV110857003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fa4187ddaaa6e55934e02a62333466dc9fed4f5d340268e4874ffc0d446484. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ATV110857002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3230968f2a2efbdf9aa43235e098dfac56420d7c1d8359355f33d96e5aded06. 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/ATV111026002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cabbb3d5ad9ba9f669fd218c2d8fbc54d6d5dff3f519bca280b09dfa9ec600. 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/ATV111138006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c3b53b040c8a3eba7969ba8a90613f1d0f8b0e189b978b692f62859264e39. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ATV111230008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c3b53b040c8a3eba7969ba8a90613f1d0f8b0e189b978b692f62859264e39. 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/ATV111230008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097dcc8ddc8c0581a680a7c6192138a578030e4b8a2bcb91b04656b5727503ea. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEQS91400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310233fbde2fde718178df05d3df687d63654e030799cc92680c0571734e98f4. 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/DEQS91400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ab0ef5759334adac6edbd178cb22db9881ba31b11ffdc51dde83b5269606e5. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DEQS91500618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa20d949f649fbea1aec1e4d56fb34f7b44865c8c990c0cdfa37f744bba270. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEQS91500627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0177bd6a9df87a3916fca8084f512bf402ca7a6d2cc9c17e548b5cb675bc6a48. 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/ATM052300663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fb74d0a18319b0424aba6442e1423431f29d37d8c7a6a41f4af7d9f5277ee3. 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/ATHZ12500020.