REDIRECT Royal Netherlands Air and Space Force
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 0x49550eb029e2d6dc04ad863794e5d28c20ffaff9d82a0e35954cccabae33a9a6. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16b2406e-73ef-48d0-b8e1-5185fa8638de.json and https://artists.proofprofile.net/proofs/artist/16b2406e-73ef-48d0-b8e1-5185fa8638de.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 0x4e1f5efa143c066b1521ae3b053590e9e9cc1968c82ff185b3ff909f5343d54e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTBB2529410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad4ba8b80dceddb86024c7fa7c616efc33442ce467fa4d3c0ddda9d6d070c8a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFR2588245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c6984e8d861f7d9573cb1f07783d1d698f11364bb361c14a103979bf15cc2a. 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/QZWFR2588226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81cd90f373ab066bcb642c5136d2d8e872a594c888914e61538aa69e5d22b35. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFR2588247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455d66054c90fc9ada0919ac78e524386aa3e41add11612472b216b71c5fb8a1. 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/QZWFR2588396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0141d84426f4b44b46da0388483052ea43a1343aebecf5d74767200e20e2bfe0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFS2573789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9328ca53b214bcbbea86b4909d2ef419b229e41e56051e1b6384aaddbb00e1. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFS2573806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6d3056c23c7ff617cd250682de900ecf7acdc239acb0c9c05489b5e4906a3. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZWFS2574046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c3319bdad7b9aaa9afcabd906210c4e8bf0e8f246d8b80879e1ca412662ab9. 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/QZWFS2573786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ff16e83a6c940ec52e4b45cd1fe48d67a454fca5fa56d57c1e151d2616cb5b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFS2573844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72cc300d7303dd01652d559b9916141103a0b63393a30abb4d424e7358e62bb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFU2589956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf56a96db47d464dbc65c30c801fa24e2fd7558f6c4ee17d4868defdcf1edbe. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFS2574070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b564db92974e31180e49c524cbe6bb2981852188e5604bc381a3d1f94a91df. 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/QZWFS2573936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bbf572dd73fa05883bf183ffd458fbab6572b5fad51819830bc5228f571478. 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/QZWFU2587147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2fa4f3b63640e7d55f2670c4f13173d3cc317dd097f295b183782c33330ae0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2587842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2c769c71586fdf0e7bc83b9e48b39e696c12c1ee4948a15f2aa6ea2f3055d8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2587833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f430ae22dbecaae75ef2d2d8512029d38f45801f721bd96bde392f052d58687. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZWFU2589997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d21e81365f83c39e559646095230bdd62e476221a709ff2d307418264d73f7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFU2587151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1983d40748bce3322c84829ce0ca117b3fec1c730136d2a4e0e8dca690ecb61. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFU2587141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3409ba15de207f369d33c1474beaf5e1e0f96477e0bd0442cbb8258b8763556. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFU2587815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792518325e07552774e50df67f8dc23a3643daf936c3cb52cd2bce339951916c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFU2587467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a0b4b26c2a96c49fde95653c212ab1efee56c227120380275f61cfbebc5e96. 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/QZWFU2587303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d8ea40db18264ca9458b48612bd27208f0eac3750595ce8bc03d36146b8633. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFU2587556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5751531850f636ba30f1b3a84251f8c6ae297ee02a775bc5eb6855cd4c61a34. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZNJZ2570675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a82a401165dd12ebcc676986b62c9ac1626760aa3f2752744c7560f24488a. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZNJZ2571731.