Koor voor Nieuwe Nederlandse Religieuze Muziek
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 0x54cba792801a78c4c95fcfe71a9f87dc7b83b59dc5b02b092324e2c72362b433. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05998aa9-d019-4077-b93a-63d531e73147.json and https://artists.proofprofile.net/proofs/artist/05998aa9-d019-4077-b93a-63d531e73147.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Dwaas Zegt in Zijn Hart: Er Is Geen God
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 0xbcb7b3c6ec2e1a135dd31082938ceb016d536db77e2ef20622975eb3f108c246. 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/NLC351749020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fe4274027a54834cb55c006624ce889821aa71a413025e09907ed8e55c079d. 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/NLC351046926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e798cad6b2411188a9930bfa54d8afc94501f36cf5c6835932ecc2ea085dfa3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLC351046921.
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
Psalm 1 - Goed is dat je niet doet wat slecht is
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0247bbc796a00c8a990c1873801724fe683f4622ff5a4c44aa335ab155d410cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLC351347701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8168bceefd53330918b66bfd6a5472267342bba9ab0b52cbeda742cf7443a0. 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/NLC351548703.
Psalm 4 - Hoor mij, wees niet doodse stilte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba4d384403510fcfc8caaa4479fdbcb6476e7d095a8d8dba4c7d6e2854f9f9a. 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/NLC351347703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc107fe5b9ce89fa9d68d5e9fbc17c99bff2e0e40cd14614a4ccb7dc0e045172. 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/NLC351347704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde13cd3e541481765a8bb6106b63ebe9d33c2e78950f59ecd2259e50e59b3f92. 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/NLC351347707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5e8e5cf93e0f5090a58f6e585b31157a90f0e3c7af0f5c7ef455bbf257073c. 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/NLC351548714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8bb981c439a28adaf7d069da0ccad7b652095aa426cba5a13e448a0c54084f. 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/NLC351347710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb003f47a057b6337d1c98db2344ba7affc9107cfb5b1876d83a4931d0c65019. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLC351347702.
Om Leven Dat Doorgaat - Een Psalmensymfonie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319f17ac2eea58b10b975ba4dd97d721a3a7ab835d8a075eb287c4f229b40cc0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLC350843488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8572dfae7d4f6564eea48fefdcd4d2e1fcf4369c24c1110844512d9d4c24cda1. 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/NLC350843486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0783b898c466002454fa6e69a0e8faba580725c6e2d886ea2370971f2975c9e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLC350843419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a5306adfda8f06cb1f7f886c67cbb360ca02fce5699ff234212d3d9c4e5331. 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/NLC351046650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274475cacaeff8430b326a8acb8ae44ba7c91a2b2cb6a8b8191e20c5dc171574. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLC350843483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb741504799973e876853cad2c73c9dc24854bbbc54351bd9283e457a72d1a764. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLC350843403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fa35fa70a4d1d11ad54c324b3ad34ddfb87be6d712e1829f714efb8bddb9bc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLC351046617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29f659c9cbef606680f8a2a676f67174a7f628537d98e2f3330b310dac91db6. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLC350843482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcce684829f48533b36af2c701484e4cc4f58bde1d75ef9259cce5d8de8c07f8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLC350843484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1179a47c656dfa11ab281bd97706611b2bf1af9e848f6259fa20e91eb36f78b7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLC350843485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df2cd372decbe532ccda3ffeeca2d5d7bf173504c455b33186338e0068be709. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLC350843487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b2740c5b4b594c262c5f6cd410412ee54a9fafaaf02353d3022ea77afbbef0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLC350843494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6a4abff46b118edafba6231e00792feb39ab236b8eb31500fc54d32b80ade3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/NLC350843411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e51342b35730c4d65718947140dd0a330df5188886e9f5ca40dd608b8b1a0fb. 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/NLC350843421.