De Nattergale is a Danish comedy band/act. They have made several CDs and three TV advent calendars on TV2, of which the most famous is The Julekalender (of which a Norwegian version was made in 1994
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 0xd1bb7b9bcfdd4045880dd45d8b80c4c074bfd5da6afb5dd695770fbf88617b80. 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/b489827a-ae52-4c4c-8a38-4dd6cc97e09a.json and https://artists.proofprofile.net/proofs/artist/b489827a-ae52-4c4c-8a38-4dd6cc97e09a.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 0x41ee78bbe95d98c30b36a9a8223e35b6fc689d533574e9303fb5fba136f6ee58. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKABA1001861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe889bae33ab85ddb8f0f4022f17fa902940ff6c1163afe62ef6cf6e9542ccd2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKABA9752010.
Roder lidt mæ' rytmeboxen - 1997 - Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe889bae33ab85ddb8f0f4022f17fa902940ff6c1163afe62ef6cf6e9542ccd2e. 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/DKABA9752010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594d8caabc98003f4237568c8671ee45f1c90c4a50633e977b131742e5893cf9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKABA9752001.
Man har da heller ik' andet end bøvl ud af det centralvarme - 1997 - Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f184a0b1295719712603e31ba0c98cad1dd5c0bc164fd628938b757bed051f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKABA9752004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594d8caabc98003f4237568c8671ee45f1c90c4a50633e977b131742e5893cf9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKABA9752001.