Bruno van Dingen (born 14 January 1998), known professionally as Brunzyn, is a Dutch rapper from Vlaardingen. His stage name comes from both footballer Hidde ter Avest and a classmate, who independent
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 0x2869f8550ad2aa136c01c4dd2ad5670639e0a111e20bd65c9a7f529532954bad. 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/b0b0751f-ee23-435c-8358-6946c73119d6.json and https://artists.proofprofile.net/proofs/artist/b0b0751f-ee23-435c-8358-6946c73119d6.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 0x6921fa97eec2f3620dd7b7a9aea79712d65d8e66c5794b2e5ef58807dbd584e7. 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/QZDA52480585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e7dca1f85871b4447673e41a5cf1f6a025700dec06d8b2e6f322efb14e7f45. 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/QZMEP2408076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa966c11278dc2bf9898cc4fb022c0e7c9f9199d97ffed7e3e5ed85e19f1d8cd6. 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/QZMEP2486227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c5d6610832a0e85cfc860f30779ffc22ed3dce98d60a9228824a94813d3b07. 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/QZMEP2408077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeac9a5a472294321cdd06b2a3500fe5d980555d323dfcc0cdbba881e428c27b. 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/QZMEP2408080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39cda8200251391e39195efd47758e99be1476072d5254b621f9a892c93d78f. 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/QZNWZ2133345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b7198d779687d646fb716d2e62935900efe8fe837807196c6346806c974c53. 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/QZNWZ2133346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be895717c01efa3e025011317795cfa77a4016ca3a80b7516fb9e21876dc66c. 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/QZNWZ2133347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2240052fabaa9834ec1a350cb2468188280b259039ab522fca47c627e8a1122e. 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/NL1MC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5357ff73493e095a2a34958975dc6b95c8a76f6d5905ab969b74955101259f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL1MC2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5702e49bc573d8f3d6d9f8343efdd79258373e9fdb8e90461b91c77baf1348f1. 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/NL1MC2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3845a57fe302c468e3dce83867dcf2ec878a1a1d48e3fc98c10b64440a8def49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL1MC2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea64fe99c396bded82eb7deceb3aeea4d8ea02f5cfab8cb184d9f51bcad7852. 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/NL1MC2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdc4927d60a56c198c3447c1b6684d93fcf8a6eb1ee2160212e238c720ad574. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1MC2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f869387926d88848c09c8629c5106906f9a05c175659bbcc7c3a97add45ec5a. 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/NL1MC2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9609df6aa6ff56211ccb05e91607e59a22eec4080cb2a38694e952fba5e41dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1MC2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc09eca493f787eada218e1302d71161b2a53c446349c1393951cd292157bed. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NL1MC2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8855807649269ac51f3c96e2ba38430774ab82d647f5c8c7b52116e92483fb. 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/QZFZ22139752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6245d253c7460929675685b308eb43265457e2592afe3213e53891fdd37a0dd8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1MC2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ebb43969710cf3f80eae816fbcd2f59b66941b28e8dd69b65da23b42a72a4a. 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/NL1MC2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf141bce8b49d5f51a51235aa306aca070f6f863e289c183f48465b60a2486da6. 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/NL1MC2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d760507d23552b3ed78e18c54e9b5fff0b0c1abe6f2f42ab41e88b6ad8359de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1MC2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f240ce481e96fe73fc148a36e43ee02f424c92bf316e9495c1bb95bcb88462. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL1MC2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a7cfa33ee4fe18be9313d56bf5e2219b2e8105ee2fc27f81ff1c528cc61c02. 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/QZHN71977134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195b52dd6d98a84d74e00643dec48d158e02b56089dd499451e84da32628102d. 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/QZHN81962730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb6c16e47b4ad5ff1b0bf53068d8e7e48012a022cb2c7ea7a9abb0b2266ac8. 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/QZES81829589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2571a1d53c8083e7b11d3115cfff2510b98dc196de07714e0243115f528245ff. 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/QZCE61846602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52d87276a5d51b83ca8ba00cd19c82ef2b3708e53ca579a59c82af88d813730. 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/QZMEM2471803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14805e46e77832666ba146a92fde759dd3e365a5177e2c1ef5c02121c9cce56b. 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/NL5HJ2300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e8c0b6aeed25c88a7eec0c904d1ac27133fd438763090ebdfcf935ce86efb. 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/NL3GQ2100492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e19c244906277f9b876742eda2d2af5888997014348d85f679c676fa2711560. 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/QZTAS2337957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d9aa547e9a5585ab89894d590220dce5db68554ead58332e35a6e6acccda8. 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/QZES82383925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97760d29d1fd5c785a3dece9f050ea9434b431633ee99c9631ea41b2ccab0343. 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/QZK6J2211651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670c8f6829c38bc63798e6b6d3bfaa19229a772d2ac7c546b939d31bc9f36e9b. 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/QZMEP2190592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb27862f5c51283c6abf2a43ae78cbf1da4fa1880df4280ed2f589ae75ac632c. 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/QZMEQ2075717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482513525726fdd05be4d2e04b097f63f776d0d4ea1853c6776011dbec16fb71. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:14Z), 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/QZFYZ2091900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a7cfa33ee4fe18be9313d56bf5e2219b2e8105ee2fc27f81ff1c528cc61c02. 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/QZHN71977134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3616d6f7258a8c1d196b14b028e5442e56124075a92b8f6b674d5fbff0a620. 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/QMPKX1841313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8848d4a603cb5503ba8077ef15f67cfa5242d483d5a8540d58b3c142965dd0e1. 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/NLZ7B2200235.