Chr. Gem. Zangver. "Looft den Heer", Notter
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 0x5dabb805e96101a0cb188b4a51d6c415bde7ced2d1a99166312c915864e6bf53. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a66e3726-0882-4bdd-9fc7-f1115ecc945a.json and https://artists.proofprofile.net/proofs/artist/a66e3726-0882-4bdd-9fc7-f1115ecc945a.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 0x19d8102da95a282bebace2bf3e316294de840fadc71b285b89c63962eea4aa1f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMBZ91612617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45576c141593187f459b3ebe94961f3cb86f8bb731a6dcea50bcedd1fbf5a740. 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/NLG620612852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ecec9b2b2e583583279c27dde67c45fe1290f725ccd8ff78a7d87eae7a2c74. 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/NLG620612853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744cd753f9ab0794a8f3f797aa5a4e4b7d066811a14d522b7fa65c7c7e4bd775. 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/NLG620612857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce0d098c78c788bb1acea8fec13863c30e0e98b4f2783f275aadad4a6dc4720. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLG620584609.
Opwekking 674 "Zie de Stroom van Jezuz Liefde"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d9f54f89294ada282abaea2ce39a1ee109d6071db785117e0630c95fc5f57c. 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/NLG620584610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bbfdccdc225e809fe5dd1eb7640271a23822f479a088105266450ef5c9e982. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLG620584611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124fbc206684e5ef3547085a6a90a142fec9fabadca8d0a9d5783c676bc23d41. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLG620584612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6a47be4e0d728cfaf288a903f8427f7ac6a7caa4c6fbe2897d25c84adfa1d3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLG620584613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7acd74f2f06e7877ea4a0d39b5ac821a1633f42551fd31e39f5a71f1cd84191. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG620584614.
Opwekking 392, "Mijn Jezuz, ik houd van U"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0997b4c274824926d7c2f40d4894d692936dbbb97b2254baa8ea086216acfe0d. 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/NLG620584615.
Opwekking 176, "U bent Mijn Schuilplaats Heer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9172fec591dfaf8d642b1494619b5ac3c5415d3c2bf0c020a16597f4cf69ef0a. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/NLG620584616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9741a78015019c86f04b945eec29cd588b02731a703623496d10c6b0176c8172. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLG620584617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba89362e0e4487cf6a425cdfb3a963424e382fcfc2aa8b640e9a2e8ff6a4a90. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620584618.
Joh. De Heer 548, "Liefde was het eind'loosGroot"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3938f8f03d168942d581933d59067814ccc55d9015137c6bbfbb5e51e96454a1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLG620584619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ab023d4025c0ae05bfe0a1bd626b6023bae8104bf9f22336c11df5b1e26fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620584620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a53318738bbbc8c4d888cf8b53053fbe6d2c601b8406050733fa16ff6b12f2. 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/NLG620584621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c768a4d750e4310876058216bb05aa78044c4f8267584fe74f8a4f8a791bec. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/NLG620584622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052f1b1f0abece95f975b645ed339d631dc072d7dd225de710e397ecfc0488b0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLG620584623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe014e94dea0e37d15420f63b9d7f4b02d48a2cbc1c15c757a23db2461c916171. 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/NLG620584624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe224ee09c4bb643a332fad187132af3f26355d432390cd5191e7213428ff7604. 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/NLG620584625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88081c46c3044778876173d758caa8f892a09853c4812c920451cf4ad3d61c31. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620584626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b949bc90d17c036ad55116fa6d3336eda279c81c86a3510baa429a6f056525d. 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/NLG620600572.
Christus is opgestaan; Daar juicht een toon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718da1b2bd4ab24f98950272a93cd913eb9c2a7b77dc628b0d2bd357b50e7e7e. 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/NLG620600428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3295fb29df8ff1ae3c4c1645f6ddd7c21a22d0ca42a6a9d8d43d66ff9056e551. 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/NLG620600438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d64e4920ac90452bc2c374d7df88fae08113e629d105034c7ad6704b607db2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLG620600441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07da1b6e3cb904ebfbe9cd4f61e6585ffaa3373f00f72cef3f0d1418557f1422. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLG620600561.