Jantje is a given name. Notable people with the name include: Jantje Friese (born 1977), German film producer and screenwriter Jantje Hagenou-Bathoorn (born 1934), Dutch speed skater Jantje Visscher,
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 0x49fec9fe1d13a1c3ba07c92a286c4e29b9dc59788ddfc33754ad9d7b011cc6e8. 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/c94c9b63-1d51-45fb-bb80-51436045962e.json and https://artists.proofprofile.net/proofs/artist/c94c9b63-1d51-45fb-bb80-51436045962e.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 0x13c2af0f50279736e4d723d738a5d92a60dbf3b4827e51986fc86ffccd7be84b. 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/QZHN32021624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a167e25be650b8eaa55cebc2176a8c283f7e3b2c28ac48a5b3aabc0488ef6. 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/QZHN32021625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec218ecd475bf16164d3bfb79574c1b5ca13e9b820661b1afd815d1c7bd32924. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHNC2067389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3bd4af1c6e333ddcbd29bd79188aa36dadb8397cc98c871b76fa03a363b68e. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/QZK6L2041189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5818da7b8d073db64a186d2f82bc0e02f2c7473043380faea3259bcddc96d2. 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/QZNWQ2046061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9ea48bf510859fe958febef6a2a908896635cffa196d834761fac6fcc39d8c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZFZ22151791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194d45b56c9c5cdd08cb660c5e31cad51239fa3d416d251d42979203545e1b78. 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/QZK6H2159200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b6a1d384d1c39decc1fde0d088127e154db3f26796af9704026deb8f51f4f6. 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/QZTAU2109191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30966cc00e7fe969097910e136be585b5de0d984ca600710446e665a39e6761c. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZHN32256117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e50e854d77d983dad2f9397190147d08867b1015845ffaee35d755e407ab7. 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/QZHN72218241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b3519269549c26ae2b214eb69b0092be687322b161978675f142e34f0fdcc7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN72218242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ea9b0b1756cb0692df34dfca77fdb5216f5bcf013306545529d75ade72939. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZHN72218243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd791284e5c73ea57e4bca7ab05ad7f5f36bfde1ecc37c9830c34e56a6d2c22a5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN72218244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0693dab12dcf757e6f220f80b82aee74a7aa0faaf9aa3faad24bc70326c48dd. 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/QZFZ72383392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b5ea737f60bb5f30d0c4e9b4ff96f5ec26d73b2596c3494e1a3bbff2ff58ac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ72383393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f19dd112ff5f515042bbedee985cc5dd4886ed5f187be93cfc9b4f8778949d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZFZ72383394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e046aed4ba18103340add1153ce157c97ce1d07163721a419a43330ab2f7fd9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ72383395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7612adf47b028d520253df5fed6fb8ef1d0e30ab07af3a098d8b369eb484ca. 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/NLS242300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216fa0c7cd3190a70b0895db24d5074b7b0766e5c0b077dedacdf604c0d7f167. 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/QZNWT2486417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd9aafea8fde6abf5c25713d1efb483d78bc024ec2d4ee1c1eac131f4b69fde. 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/QZFZ22287572.