Heidrun or Heiðrún is a female name originally from Norse mythology. People Heidrun Bluhm (born 1958), German politician Heidrun Breier (born 1971), Romanian-German-Chilean actress; see Las 2 Caro
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423479c17feaa5124d6d15429518c87dbf87c57c35395a807e6d89bebbeb7585. 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/3762c11f-cf3c-486b-b8cf-471ffa98a8cc.json and https://artists.proofprofile.net/proofs/artist/3762c11f-cf3c-486b-b8cf-471ffa98a8cc.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a0109ccb0ee34e8d19390aa08b0e622e2b4c079c04f426a6deece54a30551. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEYOK1205242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d0bc3c802a7b640091685d6b43b3e6a6f7cb72b83bf86950352714fc85224. 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/SEYOK1300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e766cea095a74f1cb61b7d737d1f3bd78e7fdd66dead45a052ed83f574ee266. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SEYOK1300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe702b11ad3ee3278b3e58e2e39757d5f389b2465f521e662db033c549aa9faa8. 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/SEYOK1300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a28b11185e18141258787a050c2a3e1edc045d161ba2b782fd5d2e0aa6f794. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/SEYOK1300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaddc7a9461f2556f62fcecd81a3d4f25d2350d2173b034fbc94ebb783fc9cb6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SEYOK1300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf60b7245710146717573476572cc24c0fb0d40b802d543fa4dbcb9aa5558692. 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/US83Z2215179.