Jan Mulder may refer to: Jan Mulder (musician) (born 1963), Dutch pianist, composer, and orchestra conductor Jan Mulder (cyclist, born 1878), Dutch track cyclist and speed skater Jan Mulder (cyclis
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 0x9fc8d0c653a52c6b3dad6d44308c2e4e50480b11ee1368c9db0fa6a15cfa9300. 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/cb565142-9f81-4d8d-8a8b-2dd45d1b5bde.json and https://artists.proofprofile.net/proofs/artist/cb565142-9f81-4d8d-8a8b-2dd45d1b5bde.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 0x0678647599826b6589a5ff238e8247dc54c7f7fa78e05be56dbcc4e5511c5951. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QMEZE1715733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb388512e124dc6cec2524513d19fdf3a3552ea513c9cef7acd260ff8754a21. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QMEZE1715783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3fe8693695071dc90e52d25bba9bc7c03e98c5c893b7bafa987055085039e3. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QMEZE1715997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32536d566510475ef696246d87853a9d7e38ef5fb6ec169df2d5e7eb71c0f6e. 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/QMEZE1715805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f3cf6f7c905cfc66640ff7a608422f407c5e70ab63c8cc17ae72123f0a5a7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:43Z), 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/QMEZE1716009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee560a60afca1149ad125c95f80b9ac155fcc68e80f11964986d7ffd2c947ea. 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/QMEZE1716008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cca40bf60fc20fcf966303d94e45d9a21a27f8dcf83059a82439fc72dee4ba. 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/QMEZE1721876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02eae7ad8df193e0004e9604cde6db36987124a6793b40caca15700eb07c58a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMEZE1721875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d66f402b4fc6ba149ddc2bdfb64996d28efdc27757aecdd68bd9e4553f4bab1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLD491700370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1614cc08d21a33cecc9c626d076a6d840a0b5132f9efb1c1d019a2a61b028150. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLD491700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9dd0ebae5d63f50edd6c57503ea782fdc9065c43b52eebf9f479c57bb81bed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLD491700372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3cc8bf2d9ac27b236a5aff7b40f8f251be4b479937d204e0ba72e600192d8e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLD491700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c5b6f04cb41a6fbe5117aaef5d2edd9362e4773c224f2428fff03c6e11d886. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:29Z), 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/NLD491700374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7c5775452da2431db0a2758b0798526d933337e57327df5565a8d5350aa3da. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:51:55Z), 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/NLD491700375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7424240ed8e5f33fee8363d67b5b6939112e549a064883b06a1840927140c93f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLD491700376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f07540ffc193559788aa8afc9f6390cbb067a7d9b2850e295171a32400c7b4a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLD491700377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8428a2499ad2293ba062b6ac81dc0c6f646643f95f03f4bbe5bad360afe72dbc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLD491700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94ed36dd0348265541ffa5d34a5cdddb60a856e3bc50224d3f96a62d8b1a2c. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/NLD491700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5686222612e4e60c6e6ee2ba13c34fd6fee5a6ba7c69daa488efb9bdb0e7b1f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:20Z), 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/NLD491700380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea3bd6052b9c4acac8d8829daa257a2878b3595ad830215e825f892f604be84. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:42Z), 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/QMEZE1742097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e4e377dd205f2b859d639d0db33268779a015469f5a10e525185a5f65cf97c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QMEZE1742095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7b8f2f63eecbf7f2f9b534062e03d337ac7f0dfc3b3d66da639b59f7cce722. 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/QMEZE1747814.
Lamb of God (From: "Crowns of Christ" Pt. 7)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ef3194bbf7b4d461d813cac11bfaf4179b5d9021900b625e137c006f74dfc5. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QMEZE2148732.
Lord of Heaven (From: "Crowns of Christ" Pt. 9)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebddf99b94f00ff1681eabc25443a86272bbd879ca6423c06688940fb51ddafa. 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/QMEZE2148734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188ba45558637a27d2639a5263a766d0c9904ca71475e68c29e868d9a9e20244. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBLFP2180523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70291a0742d42b4c349a9418bacef00f704db817e7fe64baa791e3dbf7ed1f44. 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/NLD492400451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d3008806805345b34c374d40c3b31ca7e93c353873079e7eb7d1319d8a222. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/NLD492400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e5f272fbcdc8234601f54e5f3bacbc0e78d68796f99da6ece861f8dc4e44d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:51:48Z), 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/NLD492400462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc9b9f375ec795e364f92874349b72d5efa3c05e716a71dfa6bc9cd4fe94f40. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLD492400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c39ac79c424a05ce4a5829ad44f4f2eab982babd75f2657ae2d77c9ff9b0b2. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLD492400459.
Hervormde Gemengde Zangvereniging "Vox Jubilans" Waddinxveen
Hoogtepunten uit vijf jaar Passie-Paasconcerten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dcba94ab68481ae79297197f814582337b550b18f5e33dfd33068be1845bcf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCQ60645504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd302d947100a92b634d80b2bf9ef18b080bcda593d31e330db2e1bec117eeb29. 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/NLCQ60645505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36087142bb480db22738d55dcbe22d47b57ec372e2a979c27d70beb4a199c59. 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/NLCQ60645511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43da33744701ffc75cb88e6ee93cba999995055d81304ccda68f4a71ec7b8a6. 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/NLCQ60645515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9dead64718eb06f6e3afc5a86ccbbed974069671fac8b4bb9f3a47c515fdf. 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/NLCQ60645519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6b62e6c470720b12d8337a9f239a96dfb09549e15b44d4871d7947eb46a6ad. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLCQ60645502.
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 0x1636d8caa7755860e146e0cbe8a7e783f87ed586af6dba75b2245042ffc2c6dc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLCQ60645503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dafe6a473ad14923054633379cf559700334378d3b49bb4d4d7a0436cc192a2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLCQ60645507.