Jackel is a surname. Notable people with this surname include: Karl Jäckel (1913–1984), German U-boat coxswain in World War II Eberhard Jäckel (1929–2017), German historian, noted for his studies
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 0x0828f50451168dd9f159420b536626e564ef0db0093e2110995f1a771d951b78. 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/b983633a-92c0-4b85-b4c5-bdaac1977604.json and https://artists.proofprofile.net/proofs/artist/b983633a-92c0-4b85-b4c5-bdaac1977604.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 0x4e4b204e59100c407d6930b67f8e9adac174d71a3a44db52b149facf7e4123de. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM42K2032043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3569dfd93b107ca309a42e0b5fdc023e5c2036ddbdfff3080dd8724167badea7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBKQU2136545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7a9207f813d08ac0ceccfdfc2b01d576672808e823b9c813928db8ce73ea5b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZEB2390376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4a6912ca94d58abed32953fa56103057ed88a15af46aaf33ebe5e4b9ae0303. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWV32473965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4af77474387926d39b8eab0e48d9ffe2abe54e89b2fbf10729c8b0fd52a5793. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ5FN2565465.
Won't Take It Back (Carlo Giannico Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e475614ef9c76c90be3dee2eaa0be897d3c64484faeda8dd25d1df7e6c2d7e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBRKQ2567731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbd65687fa0483ca54e0ed22b2f0fc84d194c9a6cf1e66851ed5517638e16d0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:15Z), 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/GB8KE2508066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8e64160d72f8651ced64161a89158ba9370ea851f1edbe4c72cf97f0aaa24. 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/GBKQU2512583.